diff --git a/Documentation/build.md b/Documentation/build.md
index a7d68eb599..9f5436e68e 100644
--- a/Documentation/build.md
+++ b/Documentation/build.md
@@ -6,6 +6,7 @@ Avalonia requires at least Visual Studio 2019 and .NET Core SDK 3.1 to build on
 
 ```
 git clone https://github.com/AvaloniaUI/Avalonia.git
+cd Avalonia
 git submodule update --init
 ```
 
diff --git a/packages/Avalonia/AvaloniaBuildTasks.targets b/packages/Avalonia/AvaloniaBuildTasks.targets
index 45a7f1aa44..de3830ffea 100644
--- a/packages/Avalonia/AvaloniaBuildTasks.targets
+++ b/packages/Avalonia/AvaloniaBuildTasks.targets
@@ -42,12 +42,24 @@
   </Target>
   
   <PropertyGroup>
-    <BuildAvaloniaResourcesDependsOn>$(BuildAvaloniaResourcesDependsOn);AddAvaloniaResources;ResolveReferences</BuildAvaloniaResourcesDependsOn>
+    <BuildAvaloniaResourcesDependsOn>$(BuildAvaloniaResourcesDependsOn);AddAvaloniaResources;ResolveReferences;_GenerateAvaloniaResourcesDependencyCache</BuildAvaloniaResourcesDependsOn>
   </PropertyGroup>
   
+  <Target Name="_GenerateAvaloniaResourcesDependencyCache" BeforeTargets="GenerateAvaloniaResources">
+    <ItemGroup>
+      <CustomAdditionalGenerateAvaloniaResourcesInputs Include="$(IntermediateOutputPath)/Avalonia/Resources.Inputs.cache" />
+    </ItemGroup>
+    
+    <Hash ItemsToHash="@(AvaloniaResource);@(AvaloniaXaml);$(MSBuildAllProjects)">
+      <Output TaskParameter="HashResult" PropertyName="AvaloniaResourcesDependencyHash" />
+    </Hash>
+
+    <WriteLinesToFile Overwrite="true" File="$(IntermediateOutputPath)/Avalonia/Resources.Inputs.cache" Lines="$(AvaloniaResourcesDependencyHash)" WriteOnlyWhenDifferent="True" />
+  </Target>
+  
   <Target Name="GenerateAvaloniaResources" 
           BeforeTargets="CoreCompile;CoreResGen"
-          Inputs="@(AvaloniaResource);@(AvaloniaXaml);$(MSBuildAllProjects)"
+          Inputs="@(AvaloniaResource);@(AvaloniaXaml);@(CustomAdditionalGenerateAvaloniaResourcesInputs);$(MSBuildAllProjects)"
           Outputs="$(AvaloniaResourcesTemporaryFilePath)"
 	  DependsOnTargets="$(BuildAvaloniaResourcesDependsOn)">
     <ItemGroup>
diff --git a/src/Avalonia.Controls.DataGrid/DataGrid.cs b/src/Avalonia.Controls.DataGrid/DataGrid.cs
index ab1aff9220..fea02dabf4 100644
--- a/src/Avalonia.Controls.DataGrid/DataGrid.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGrid.cs
@@ -3039,6 +3039,12 @@ namespace Avalonia.Controls
             }
         }
 
+        //TODO: Ensure right button is checked for
+        internal bool UpdateStateOnMouseRightButtonDown(PointerPressedEventArgs pointerPressedEventArgs, int columnIndex, int slot, bool allowEdit)
+        {
+            KeyboardHelper.GetMetaKeyState(pointerPressedEventArgs.KeyModifiers, out bool ctrl, out bool shift);
+            return UpdateStateOnMouseRightButtonDown(pointerPressedEventArgs, columnIndex, slot, allowEdit, shift, ctrl);
+        }
         //TODO: Ensure left button is checked for
         internal bool UpdateStateOnMouseLeftButtonDown(PointerPressedEventArgs pointerPressedEventArgs, int columnIndex, int slot, bool allowEdit)
         {
@@ -4489,17 +4495,27 @@ namespace Avalonia.Controls
                 element = dataGridColumn.GenerateEditingElementInternal(dataGridCell, dataGridRow.DataContext);
                 if (element != null)
                 {
-                    // Subscribe to the new element's events
-                    element.Initialized += EditingElement_Initialized;
+
+                    dataGridCell.Content = element;
+                    if (element.IsInitialized)
+                    {
+                        PreparingCellForEditPrivate(element as Control);
+                    }
+                    else
+                    {
+                        // Subscribe to the new element's events
+                        element.Initialized += EditingElement_Initialized;
+                    }
                 }
             }
             else
             {
                 // Generate Element and apply column style if available
                 element = dataGridColumn.GenerateElementInternal(dataGridCell, dataGridRow.DataContext);
+                dataGridCell.Content = element;
             }
 
-            dataGridCell.Content = element;
+            
         }
 
         private void PreparingCellForEditPrivate(Control editingElement)
@@ -5711,6 +5727,35 @@ namespace Avalonia.Controls
             VerticalScroll?.Invoke(sender, e);
         }
 
+        //TODO: Ensure right button is checked for
+        private bool UpdateStateOnMouseRightButtonDown(PointerPressedEventArgs pointerPressedEventArgs, int columnIndex, int slot, bool allowEdit, bool shift, bool ctrl)
+        {
+            Debug.Assert(slot >= 0);
+
+            if (shift || ctrl)
+            {
+                return true;
+            }
+            if (IsSlotOutOfBounds(slot))
+            {
+                return true;
+            }
+            if (GetRowSelection(slot))
+            {
+                return true;
+            }
+            // Unselect everything except the row that was clicked on
+            try
+            {
+                UpdateSelectionAndCurrency(columnIndex, slot, DataGridSelectionAction.SelectCurrent, scrollIntoView: false);
+            }
+            finally
+            {
+                NoSelectionChangeCount--;
+            }
+            return true;
+        }
+
         //TODO: Ensure left button is checked for
         private bool UpdateStateOnMouseLeftButtonDown(PointerPressedEventArgs pointerPressedEventArgs, int columnIndex, int slot, bool allowEdit, bool shift, bool ctrl)
         {
diff --git a/src/Avalonia.Controls.DataGrid/DataGridCell.cs b/src/Avalonia.Controls.DataGrid/DataGridCell.cs
index 7dda936317..e3f150f5c4 100644
--- a/src/Avalonia.Controls.DataGrid/DataGridCell.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGridCell.cs
@@ -161,29 +161,42 @@ namespace Avalonia.Controls
         private void DataGridCell_PointerPressed(PointerPressedEventArgs e)
         {
             // OwningGrid is null for TopLeftHeaderCell and TopRightHeaderCell because they have no OwningRow
-            if (OwningGrid != null)
+            if (OwningGrid == null)
             {
-                OwningGrid.OnCellPointerPressed(new DataGridCellPointerPressedEventArgs(this, OwningRow, OwningColumn, e));
-                if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
+                return;
+            }
+            OwningGrid.OnCellPointerPressed(new DataGridCellPointerPressedEventArgs(this, OwningRow, OwningColumn, e));
+            if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
+            {
+                if (!e.Handled)
+                //if (!e.Handled && OwningGrid.IsTabStop)
+                {
+                    OwningGrid.Focus();
+                }
+                if (OwningRow != null)
                 {
-                    if (!e.Handled)
-                    //if (!e.Handled && OwningGrid.IsTabStop)
+                    var handled = OwningGrid.UpdateStateOnMouseLeftButtonDown(e, ColumnIndex, OwningRow.Slot, !e.Handled);
+
+                    // Do not handle PointerPressed with touch,
+                    // so we can start scroll gesture on the same event.
+                    if (e.Pointer.Type != PointerType.Touch)
                     {
-                        OwningGrid.Focus();
+                        e.Handled = handled;
                     }
-                    if (OwningRow != null)
-                    {
-                        var handled = OwningGrid.UpdateStateOnMouseLeftButtonDown(e, ColumnIndex, OwningRow.Slot, !e.Handled);
-
-                        // Do not handle PointerPressed with touch,
-                        // so we can start scroll gesture on the same event.
-                        if (e.Pointer.Type != PointerType.Touch)
-                        {
-                            e.Handled = handled;
-                        }
 
-                        OwningGrid.UpdatedStateOnMouseLeftButtonDown = true;
-                    }
+                    OwningGrid.UpdatedStateOnMouseLeftButtonDown = true;
+                }
+            }
+            else if (e.GetCurrentPoint(this).Properties.IsRightButtonPressed)
+            {
+                if (!e.Handled)
+                //if (!e.Handled && OwningGrid.IsTabStop)
+                {
+                    OwningGrid.Focus();
+                }
+                if (OwningRow != null)
+                {
+                    e.Handled = OwningGrid.UpdateStateOnMouseRightButtonDown(e, ColumnIndex, OwningRow.Slot, !e.Handled);
                 }
             }
         }
diff --git a/src/Avalonia.Controls.DataGrid/DataGridDataConnection.cs b/src/Avalonia.Controls.DataGrid/DataGridDataConnection.cs
index a94acdec57..fade597ca1 100644
--- a/src/Avalonia.Controls.DataGrid/DataGridDataConnection.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGridDataConnection.cs
@@ -233,7 +233,7 @@ namespace Avalonia.Controls
                 else
                 {
                     editableCollectionView.EditItem(dataItem);
-                    return editableCollectionView.IsEditingItem;
+                    return editableCollectionView.IsEditingItem || editableCollectionView.IsAddingNew;
                 }
             }
 
@@ -314,7 +314,14 @@ namespace Avalonia.Controls
                 CommittingEdit = true;
                 try
                 {
-                    editableCollectionView.CommitEdit();
+                    if (editableCollectionView.IsAddingNew)
+                    {
+                        editableCollectionView.CommitNew();
+                    }
+                    else
+                    {
+                        editableCollectionView.CommitEdit();
+                    }                    
                 }
                 finally
                 {
diff --git a/src/Avalonia.Controls.DataGrid/DataGridRow.cs b/src/Avalonia.Controls.DataGrid/DataGridRow.cs
index 7546970498..1efce7c0b8 100644
--- a/src/Avalonia.Controls.DataGrid/DataGridRow.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGridRow.cs
@@ -378,13 +378,13 @@ namespace Avalonia.Controls
                     }
                 }
             }
-        } 
+        }
 
         internal Panel RootElement
         {
             get;
             private set;
-        } 
+        }
 
         internal int Slot
         {
@@ -638,7 +638,7 @@ namespace Avalonia.Controls
                 PseudoClasses.Set(":editing", IsEditing);
                 PseudoClasses.Set(":invalid", !IsValid);
                 ApplyHeaderStatus();
-            } 
+            }
         }
 
         //TODO Animation
@@ -896,7 +896,7 @@ namespace Avalonia.Controls
                     _detailsElement.ContentHeight = _detailsDesiredHeight;
                 }
             }
-        } 
+        }
 
         // Makes sure the _detailsDesiredHeight is initialized.  We need to measure it to know what
         // height we want to animate to.  Subsequently, we just update that height in response to SizeChanged
@@ -919,7 +919,7 @@ namespace Avalonia.Controls
 
         //TODO Cleanup
         double? _previousDetailsHeight = null;
-        
+
         //TODO Animation 
         private void DetailsContent_HeightChanged(double newValue)
         {
@@ -1022,7 +1022,7 @@ namespace Avalonia.Controls
                 }
             }
         }
-        
+
         internal void ApplyDetailsTemplate(bool initializeDetailsPreferredHeight)
         {
             if (_detailsElement != null && AreDetailsVisible)
@@ -1066,7 +1066,7 @@ namespace Avalonia.Controls
                                                .Subscribe(DetailsContent_MarginChanged);
 
                         }
-                        
+
                         _detailsElement.Children.Add(_detailsContent);
                     }
                 }
@@ -1090,6 +1090,28 @@ namespace Avalonia.Controls
                 }
             }
         }
+        
+
+        protected override void OnPropertyChanged<T>(AvaloniaPropertyChangedEventArgs<T> change)
+        {
+            if (change.Property == DataContextProperty)
+            {
+                var owner = OwningGrid;
+                if (owner != null && this.IsRecycled)
+                {
+                    var columns = owner.ColumnsItemsInternal;
+                    var nc = columns.Count;
+                    for (int ci = 0; ci < nc; ci++)
+                    {
+                        if (columns[ci] is DataGridTemplateColumn column)
+                        {
+                            column.RefreshCellContent((Control)this.Cells[column.Index].Content, nameof(DataGridTemplateColumn.CellTemplate));
+                        }
+                    }
+                }
+            }
+            base.OnPropertyChanged(change);
+        }
 
     }
 
diff --git a/src/Avalonia.Controls.DataGrid/DataGridRowGroupHeader.cs b/src/Avalonia.Controls.DataGrid/DataGridRowGroupHeader.cs
index 1e03b134b1..49ca23d34c 100644
--- a/src/Avalonia.Controls.DataGrid/DataGridRowGroupHeader.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGridRowGroupHeader.cs
@@ -283,7 +283,11 @@ namespace Avalonia.Controls
         //TODO TabStop
         private void DataGridRowGroupHeader_PointerPressed(PointerPressedEventArgs e)
         {
-            if (OwningGrid != null && e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
+            if (OwningGrid == null)
+            {
+                return;
+            }
+            if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
             {
                 if (OwningGrid.IsDoubleClickRecordsClickOnCall(this) && !e.Handled)
                 {
@@ -300,6 +304,15 @@ namespace Avalonia.Controls
                     e.Handled = OwningGrid.UpdateStateOnMouseLeftButtonDown(e, OwningGrid.CurrentColumnIndex, RowGroupInfo.Slot, allowEdit: false);
                 }
             }
+            else if (e.GetCurrentPoint(this).Properties.IsRightButtonPressed)
+            {
+                if (!e.Handled)
+                {
+                    OwningGrid.Focus();
+                }
+                e.Handled = OwningGrid.UpdateStateOnMouseRightButtonDown(e, OwningGrid.CurrentColumnIndex, RowGroupInfo.Slot, allowEdit: false);
+            }
+
         }
 
         private void EnsureChildClip(Visual child, double frozenLeftEdge)
diff --git a/src/Avalonia.Controls.DataGrid/DataGridRowHeader.cs b/src/Avalonia.Controls.DataGrid/DataGridRowHeader.cs
index 0cd3589a57..510072174f 100644
--- a/src/Avalonia.Controls.DataGrid/DataGridRowHeader.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGridRowHeader.cs
@@ -179,12 +179,12 @@ namespace Avalonia.Controls.Primitives
         //TODO TabStop
         private void DataGridRowHeader_PointerPressed(object sender, PointerPressedEventArgs e)
         {
-            if (!e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
+            if (OwningGrid == null)
             {
                 return;
             }
 
-            if (OwningGrid != null)
+            if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
             {
                 if (!e.Handled)
                 //if (!e.Handled && OwningGrid.IsTabStop)
@@ -199,6 +199,19 @@ namespace Avalonia.Controls.Primitives
                     OwningGrid.UpdatedStateOnMouseLeftButtonDown = true;
                 }
             }
+            else if (e.GetCurrentPoint(this).Properties.IsRightButtonPressed)
+            {
+                if (!e.Handled)
+                {
+                    OwningGrid.Focus();
+                }
+                if (OwningRow != null)
+                {
+                    Debug.Assert(sender is DataGridRowHeader);
+                    Debug.Assert(sender == this);
+                    e.Handled = OwningGrid.UpdateStateOnMouseRightButtonDown(e, -1, Slot, false);
+                }
+            }
         } 
 
     }
diff --git a/src/Avalonia.Controls/Design.cs b/src/Avalonia.Controls/Design.cs
index 0d05e19e53..07d2918a88 100644
--- a/src/Avalonia.Controls/Design.cs
+++ b/src/Avalonia.Controls/Design.cs
@@ -60,6 +60,19 @@ namespace Avalonia.Controls
             return target.GetValue(PreviewWithProperty);
         }
 
+        public static readonly AttachedProperty<IStyle> DesignStyleProperty = AvaloniaProperty
+            .RegisterAttached<Control, IStyle>("DesignStyle", typeof(Design));
+
+        public static void SetDesignStyle(Control control, IStyle value)
+        {
+            control.SetValue(DesignStyleProperty, value);
+        }
+
+        public static IStyle GetDesignStyle(Control control)
+        {
+            return control.GetValue(DesignStyleProperty);
+        }
+
         public static void ApplyDesignModeProperties(Control target, Control source)
         {
             if (source.IsSet(WidthProperty))
@@ -68,6 +81,8 @@ namespace Avalonia.Controls
                 target.Height = source.GetValue(HeightProperty);
             if (source.IsSet(DataContextProperty))
                 target.DataContext = source.GetValue(DataContextProperty);
+            if (source.IsSet(DesignStyleProperty))
+                target.Styles.Add(source.GetValue(DesignStyleProperty));
         }
     }
 }
diff --git a/src/Avalonia.Controls/Flyouts/FlyoutBase.cs b/src/Avalonia.Controls/Flyouts/FlyoutBase.cs
index 230b4954fe..4b903d056c 100644
--- a/src/Avalonia.Controls/Flyouts/FlyoutBase.cs
+++ b/src/Avalonia.Controls/Flyouts/FlyoutBase.cs
@@ -215,11 +215,6 @@ namespace Avalonia.Controls.Primitives
                 }
             }
 
-            if (CancelOpening())
-            {
-                return false;
-            }
-
             if (Popup.Parent != null && Popup.Parent != placementTarget)
             {
                 ((ISetLogicalParent)Popup).SetParent(null);
@@ -236,6 +231,11 @@ namespace Avalonia.Controls.Primitives
                 Popup.Child = CreatePresenter();
             }
 
+            if (CancelOpening())
+            {
+                return false;
+            }
+
             PositionPopup(showAtPointer);
             IsOpen = Popup.IsOpen = true;
             OnOpened();
diff --git a/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs b/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs
index 209feb351c..e361e7b736 100644
--- a/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs
+++ b/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs
@@ -275,7 +275,7 @@ namespace Avalonia.Controls.Platform
                 return;
             }
 
-            if (item.HasSubMenu)
+            if (item.HasSubMenu && item.IsEffectivelyEnabled)
             {
                 Open(item, true);
             }
@@ -303,7 +303,8 @@ namespace Avalonia.Controls.Platform
                 {
                     item.Parent.SelectedItem.Close();
                     SelectItemAndAncestors(item);
-                    Open(item, false);
+                    if (item.HasSubMenu)
+                        Open(item, false);
                 }
                 else
                 {
diff --git a/src/Avalonia.Controls/Primitives/Popup.cs b/src/Avalonia.Controls/Primitives/Popup.cs
index e804c4b4a9..a5cdeefb0e 100644
--- a/src/Avalonia.Controls/Primitives/Popup.cs
+++ b/src/Avalonia.Controls/Primitives/Popup.cs
@@ -53,6 +53,7 @@ namespace Avalonia.Controls.Primitives
             AvaloniaProperty.Register<Popup, PopupPositionerConstraintAdjustment>(
                 nameof(PlacementConstraintAdjustment),
                 PopupPositionerConstraintAdjustment.FlipX | PopupPositionerConstraintAdjustment.FlipY |
+                PopupPositionerConstraintAdjustment.SlideX | PopupPositionerConstraintAdjustment.SlideY |
                 PopupPositionerConstraintAdjustment.ResizeX | PopupPositionerConstraintAdjustment.ResizeY);
 
         /// <summary>
@@ -145,7 +146,9 @@ namespace Avalonia.Controls.Primitives
         {
             IsHitTestVisibleProperty.OverrideDefaultValue<Popup>(false);
             ChildProperty.Changed.AddClassHandler<Popup>((x, e) => x.ChildChanged(e));
-            IsOpenProperty.Changed.AddClassHandler<Popup>((x, e) => x.IsOpenChanged((AvaloniaPropertyChangedEventArgs<bool>)e));            
+            IsOpenProperty.Changed.AddClassHandler<Popup>((x, e) => x.IsOpenChanged((AvaloniaPropertyChangedEventArgs<bool>)e));    
+            VerticalOffsetProperty.Changed.AddClassHandler<Popup>((x, _) => x.HandlePositionChange());    
+            HorizontalOffsetProperty.Changed.AddClassHandler<Popup>((x, _) => x.HandlePositionChange());
         }
 
         /// <summary>
@@ -519,6 +522,24 @@ namespace Avalonia.Controls.Primitives
             base.OnDetachedFromLogicalTree(e);
             Close();
         }
+        
+        private void HandlePositionChange()
+        {
+            if (_openState != null)
+            {
+                var placementTarget = PlacementTarget ?? this.FindLogicalAncestorOfType<IControl>();
+                if (placementTarget == null)
+                    return;
+                _openState.PopupHost.ConfigurePosition(
+                    placementTarget,
+                    PlacementMode,
+                    new Point(HorizontalOffset, VerticalOffset),
+                    PlacementAnchor,
+                    PlacementGravity,
+                    PlacementConstraintAdjustment,
+                    PlacementRect);
+            }
+        }
 
         private static IDisposable SubscribeToEventHandler<T, TEventHandler>(T target, TEventHandler handler, Action<T, TEventHandler> subscribe, Action<T, TEventHandler> unsubscribe)
         {
diff --git a/src/Avalonia.Diagnostics/Diagnostics/Views/MainWindow.xaml.cs b/src/Avalonia.Diagnostics/Diagnostics/Views/MainWindow.xaml.cs
index ea06c33e4d..73d867bf10 100644
--- a/src/Avalonia.Diagnostics/Diagnostics/Views/MainWindow.xaml.cs
+++ b/src/Avalonia.Diagnostics/Diagnostics/Views/MainWindow.xaml.cs
@@ -160,13 +160,19 @@ namespace Avalonia.Diagnostics.Views
                 return;
             }
 
+            var root = Root;
+            if (root is null)
+            {
+                return;
+            }
+
             switch (e.Modifiers)
             {
                 case RawInputModifiers.Control | RawInputModifiers.Shift:
                 {
                     IControl? control = null;
 
-                    foreach (var popupRoot in GetPopupRoots(Root))
+                    foreach (var popupRoot in GetPopupRoots(root))
                     {
                         control = GetHoveredControl(popupRoot);
 
@@ -176,7 +182,7 @@ namespace Avalonia.Diagnostics.Views
                         }
                     }
 
-                    control ??= GetHoveredControl(Root);
+                    control ??= GetHoveredControl(root);
 
                     if (control != null)
                     {
@@ -190,7 +196,7 @@ namespace Avalonia.Diagnostics.Views
                 {
                     vm.FreezePopups = !vm.FreezePopups;
 
-                    foreach (var popupRoot in GetPopupRoots(Root))
+                    foreach (var popupRoot in GetPopupRoots(root))
                     {
                         if (popupRoot.Parent is Popup popup)
                         {
diff --git a/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs b/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs
index 55e30396e1..5d7619d184 100644
--- a/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs
+++ b/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs
@@ -30,13 +30,13 @@ namespace Avalonia.Dialogs
             }
             else
             {
-                using (Process process = Process.Start(new ProcessStartInfo
+                using Process process = Process.Start(new ProcessStartInfo
                 {
                     FileName = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? url : "open",
                     Arguments = RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? $"{url}" : "",
                     CreateNoWindow = true,
                     UseShellExecute = RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
-                }));
+                });
             }
         }
 
diff --git a/src/Avalonia.Dialogs/ManagedFileChooser.cs b/src/Avalonia.Dialogs/ManagedFileChooser.cs
index f9f38ac474..9058c405a3 100644
--- a/src/Avalonia.Dialogs/ManagedFileChooser.cs
+++ b/src/Avalonia.Dialogs/ManagedFileChooser.cs
@@ -1,13 +1,11 @@
 using System;
 using System.Linq;
 using System.Threading.Tasks;
-using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.LogicalTree;
-using Avalonia.Markup.Xaml;
 
 namespace Avalonia.Dialogs
 {
@@ -35,7 +33,9 @@ namespace Avalonia.Dialogs
             if (_quickLinksRoot != null)
             {
                 var isQuickLink = _quickLinksRoot.IsLogicalAncestorOf(e.Source as Control);
+#pragma warning disable CS0618 // Type or member is obsolete
                 if (e.ClickCount == 2 || isQuickLink)
+#pragma warning restore CS0618 // Type or member is obsolete
                 {
                     if (model.ItemType == ManagedFileChooserItemType.File)
                     {
diff --git a/src/Avalonia.Dialogs/ManagedFileChooserSources.cs b/src/Avalonia.Dialogs/ManagedFileChooserSources.cs
index 050d618ce1..a217a67bc6 100644
--- a/src/Avalonia.Dialogs/ManagedFileChooserSources.cs
+++ b/src/Avalonia.Dialogs/ManagedFileChooserSources.cs
@@ -67,7 +67,7 @@ namespace Avalonia.Dialogs
                        {
                            Directory.GetFiles(x.VolumePath);
                        }
-                       catch (Exception _)
+                       catch (Exception)
                        {
                            return null;
                        }
diff --git a/src/Avalonia.Headless/HeadlessPlatformRenderInterface.cs b/src/Avalonia.Headless/HeadlessPlatformRenderInterface.cs
index 268171d467..63cbfb2dbe 100644
--- a/src/Avalonia.Headless/HeadlessPlatformRenderInterface.cs
+++ b/src/Avalonia.Headless/HeadlessPlatformRenderInterface.cs
@@ -47,6 +47,8 @@ namespace Avalonia.Headless
         }
 
         public IStreamGeometryImpl CreateStreamGeometry() => new HeadlessStreamingGeometryStub();
+        public IGeometryImpl CreateGeometryGroup(FillRule fillRule, IReadOnlyList<Geometry> children) => throw new NotImplementedException();
+        public IGeometryImpl CreateCombinedGeometry(GeometryCombineMode combineMode, Geometry g1, Geometry g2) => throw new NotImplementedException();
 
         public IRenderTarget CreateRenderTarget(IEnumerable<object> surfaces) => new HeadlessRenderTarget();
 
diff --git a/src/Avalonia.Input/Gestures.cs b/src/Avalonia.Input/Gestures.cs
index f2cc9e9072..8d74001309 100644
--- a/src/Avalonia.Input/Gestures.cs
+++ b/src/Avalonia.Input/Gestures.cs
@@ -81,17 +81,21 @@ namespace Avalonia.Input
                 var e = (PointerPressedEventArgs)ev;
                 var visual = (IVisual)ev.Source;
 
-                if (e.ClickCount <= 1)
+#pragma warning disable CS0618 // Type or member is obsolete
+                var clickCount = e.ClickCount;
+#pragma warning restore CS0618 // Type or member is obsolete
+                if (clickCount <= 1)
                 {
                     s_lastPress = new WeakReference<IInteractive>(ev.Source);
                 }
-                else if (s_lastPress != null && e.ClickCount == 2 && e.GetCurrentPoint(visual).Properties.IsLeftButtonPressed)
+                else if (s_lastPress != null && clickCount == 2 && e.GetCurrentPoint(visual).Properties.IsLeftButtonPressed)
                 {
                     if (s_lastPress.TryGetTarget(out var target) && target == e.Source)
                     {
                         e.Source.RaiseEvent(new TappedEventArgs(DoubleTappedEvent, e));
                     }
                 }
+
             }
         }
 
diff --git a/src/Avalonia.Input/MouseDevice.cs b/src/Avalonia.Input/MouseDevice.cs
index cfa3690daf..401c6cb2ac 100644
--- a/src/Avalonia.Input/MouseDevice.cs
+++ b/src/Avalonia.Input/MouseDevice.cs
@@ -75,7 +75,9 @@ namespace Avalonia.Input
                 throw new InvalidOperationException("Control is not attached to visual tree.");
             }
 
+#pragma warning disable CS0618 // Type or member is obsolete
             var rootPoint = relativeTo.VisualRoot.PointToClient(Position);
+#pragma warning restore CS0618 // Type or member is obsolete
             var transform = relativeTo.VisualRoot.TransformToVisual(relativeTo);
             return rootPoint * transform!.Value;
         }
diff --git a/src/Avalonia.Themes.Default/Expander.xaml b/src/Avalonia.Themes.Default/Expander.xaml
index 5e0958c54c..7df65677b6 100644
--- a/src/Avalonia.Themes.Default/Expander.xaml
+++ b/src/Avalonia.Themes.Default/Expander.xaml
@@ -101,6 +101,7 @@
                               Grid.Column="1" 
                               Background="Transparent" 
                               Content="{TemplateBinding Content}" 
+                              ContentTemplate="{Binding $parent[Expander].HeaderTemplate}"
                               VerticalAlignment="Center" 
                               HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                               VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
diff --git a/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml b/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml
index 3903096933..72c25cea37 100644
--- a/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/MenuItem.xaml
@@ -75,8 +75,6 @@
               </Grid.ColumnDefinitions>
               <ContentPresenter Name="PART_IconPresenter"
                                 Content="{TemplateBinding Icon}"
-                                Width="16"
-                                Height="16"
                                 Margin="{DynamicResource MenuIconPresenterMargin}"
                                 HorizontalAlignment="Center"
                                 VerticalAlignment="Center" />
@@ -199,6 +197,8 @@
   </Style>
 
   <Style Selector="MenuItem /template/ ContentPresenter#PART_IconPresenter">
+    <Setter Property="Width" Value="16" />
+    <Setter Property="Height" Value="16" />
     <Setter Property="IsVisible" Value="False" />
   </Style>
   <Style Selector="MenuItem:icon /template/ ContentPresenter#PART_IconPresenter">
diff --git a/src/Avalonia.Themes.Fluent/Controls/NotificationCard.xaml b/src/Avalonia.Themes.Fluent/Controls/NotificationCard.xaml
index c06b501f82..924d977eb5 100644
--- a/src/Avalonia.Themes.Fluent/Controls/NotificationCard.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/NotificationCard.xaml
@@ -17,7 +17,7 @@
     <Setter Property="Template">
       <ControlTemplate>
         <LayoutTransformControl Name="PART_LayoutTransformControl" UseRenderTransform="True">
-          <Border CornerRadius="{DynamicResource ControlCornerRadius}" BoxShadow="0 6 8 0 #4F000000" Margin="5 5 5 10">
+          <Border CornerRadius="{TemplateBinding CornerRadius}" BoxShadow="0 6 8 0 #4F000000" Margin="5 5 5 10">
             <Border Background="{TemplateBinding Background}"
                     BorderBrush="{TemplateBinding BorderBrush}"
                     BorderThickness="{TemplateBinding BorderThickness}"
diff --git a/src/Avalonia.Themes.Fluent/Controls/ProgressBar.xaml b/src/Avalonia.Themes.Fluent/Controls/ProgressBar.xaml
index bd5c4d4691..7ad75588e1 100644
--- a/src/Avalonia.Themes.Fluent/Controls/ProgressBar.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/ProgressBar.xaml
@@ -23,11 +23,11 @@
         <Border x:Name="ProgressBarRoot" ClipToBounds="True" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}">          
             <Panel>
               <Panel x:Name="DeterminateRoot">
-                <Border CornerRadius="{DynamicResource ControlCornerRadius}" x:Name="PART_Indicator" Margin="{TemplateBinding Padding}" Background="{TemplateBinding Foreground}" />
+                <Border CornerRadius="{TemplateBinding CornerRadius}" x:Name="PART_Indicator" Margin="{TemplateBinding Padding}" Background="{TemplateBinding Foreground}" />
               </Panel>
               <Panel x:Name="IndeterminateRoot">
-                <Border x:Name="IndeterminateProgressBarIndicator" CornerRadius="{DynamicResource ControlCornerRadius}" Margin="{TemplateBinding Padding}" Background="{TemplateBinding Foreground}" />
-                <Border x:Name="IndeterminateProgressBarIndicator2" CornerRadius="{DynamicResource ControlCornerRadius}" Margin="{TemplateBinding Padding}" Background="{TemplateBinding Foreground}" />
+                <Border x:Name="IndeterminateProgressBarIndicator" CornerRadius="{TemplateBinding CornerRadius}" Margin="{TemplateBinding Padding}" Background="{TemplateBinding Foreground}" />
+                <Border x:Name="IndeterminateProgressBarIndicator2" CornerRadius="{TemplateBinding CornerRadius}" Margin="{TemplateBinding Padding}" Background="{TemplateBinding Foreground}" />
               </Panel>
             </Panel>          
         </Border>
diff --git a/src/Avalonia.Visuals/ApiCompatBaseline.txt b/src/Avalonia.Visuals/ApiCompatBaseline.txt
index 39a4c3004c..e3f9f9a070 100644
--- a/src/Avalonia.Visuals/ApiCompatBaseline.txt
+++ b/src/Avalonia.Visuals/ApiCompatBaseline.txt
@@ -67,6 +67,8 @@ InterfacesShouldHaveSameMembers : Interface member 'public System.Double Avaloni
 InterfacesShouldHaveSameMembers : Interface member 'public System.Boolean Avalonia.Platform.IGeometryImpl.TryGetPointAndTangentAtDistance(System.Double, Avalonia.Point, Avalonia.Point)' is present in the implementation but not in the contract.
 InterfacesShouldHaveSameMembers : Interface member 'public System.Boolean Avalonia.Platform.IGeometryImpl.TryGetPointAtDistance(System.Double, Avalonia.Point)' is present in the implementation but not in the contract.
 InterfacesShouldHaveSameMembers : Interface member 'public System.Boolean Avalonia.Platform.IGeometryImpl.TryGetSegment(System.Double, System.Double, System.Boolean, Avalonia.Platform.IGeometryImpl)' is present in the implementation but not in the contract.
+InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IGeometryImpl Avalonia.Platform.IPlatformRenderInterface.CreateCombinedGeometry(Avalonia.Media.GeometryCombineMode, Avalonia.Media.Geometry, Avalonia.Media.Geometry)' is present in the implementation but not in the contract.
+InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IGeometryImpl Avalonia.Platform.IPlatformRenderInterface.CreateGeometryGroup(Avalonia.Media.FillRule, System.Collections.Generic.IReadOnlyList<Avalonia.Media.Geometry>)' is present in the implementation but not in the contract.
 InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IGlyphRunImpl Avalonia.Platform.IPlatformRenderInterface.CreateGlyphRun(Avalonia.Media.GlyphRun)' is present in the implementation but not in the contract.
 InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IGlyphRunImpl Avalonia.Platform.IPlatformRenderInterface.CreateGlyphRun(Avalonia.Media.GlyphRun, System.Double)' is present in the contract but not in the implementation.
 MembersMustExist : Member 'public Avalonia.Platform.IGlyphRunImpl Avalonia.Platform.IPlatformRenderInterface.CreateGlyphRun(Avalonia.Media.GlyphRun, System.Double)' does not exist in the implementation but it does exist in the contract.
@@ -74,4 +76,4 @@ InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IWr
 InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IWriteableBitmapImpl Avalonia.Platform.IPlatformRenderInterface.LoadWriteableBitmap(System.String)' is present in the implementation but not in the contract.
 InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IWriteableBitmapImpl Avalonia.Platform.IPlatformRenderInterface.LoadWriteableBitmapToHeight(System.IO.Stream, System.Int32, Avalonia.Visuals.Media.Imaging.BitmapInterpolationMode)' is present in the implementation but not in the contract.
 InterfacesShouldHaveSameMembers : Interface member 'public Avalonia.Platform.IWriteableBitmapImpl Avalonia.Platform.IPlatformRenderInterface.LoadWriteableBitmapToWidth(System.IO.Stream, System.Int32, Avalonia.Visuals.Media.Imaging.BitmapInterpolationMode)' is present in the implementation but not in the contract.
-Total Issues: 75
+Total Issues: 77
diff --git a/src/Avalonia.Visuals/Media/CombinedGeometry.cs b/src/Avalonia.Visuals/Media/CombinedGeometry.cs
new file mode 100644
index 0000000000..2202030b7a
--- /dev/null
+++ b/src/Avalonia.Visuals/Media/CombinedGeometry.cs
@@ -0,0 +1,170 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Avalonia.Platform;
+
+#nullable enable
+
+namespace Avalonia.Media
+{
+    public enum GeometryCombineMode
+    {
+        /// <summary>
+        /// The two regions are combined by taking the union of both. The resulting geometry is
+        /// geometry A + geometry B.
+        /// </summary>
+        Union,
+
+        /// <summary>
+        /// The two regions are combined by taking their intersection. The new area consists of the
+        /// overlapping region between the two geometries.
+        /// </summary>
+        Intersect,
+
+        /// <summary>
+        /// The two regions are combined by taking the area that exists in the first region but not
+        /// the second and the area that exists in the second region but not the first. The new
+        /// region consists of (A-B) + (B-A), where A and B are geometries.
+        /// </summary>
+        Xor,
+
+        /// <summary>
+        /// The second region is excluded from the first. Given two geometries, A and B, the area of
+        /// geometry B is removed from the area of geometry A, producing a region that is A-B.
+        /// </summary>
+        Exclude,
+    }
+
+    /// <summary>
+    /// Represents a 2-D geometric shape defined by the combination of two Geometry objects.
+    /// </summary>
+    public class CombinedGeometry : Geometry
+    {
+        /// <summary>
+        /// Defines the <see cref="Geometry1"/> property.
+        /// </summary>
+        public static readonly StyledProperty<Geometry?> Geometry1Property =
+            AvaloniaProperty.Register<CombinedGeometry, Geometry?>(nameof(Geometry1));
+
+        /// <summary>
+        /// Defines the <see cref="Geometry2"/> property.
+        /// </summary>
+        public static readonly StyledProperty<Geometry?> Geometry2Property =
+            AvaloniaProperty.Register<CombinedGeometry, Geometry?>(nameof(Geometry2));
+        /// <summary>
+        /// Defines the <see cref="GeometryCombineMode"/> property.
+        /// </summary>
+        public static readonly StyledProperty<GeometryCombineMode> GeometryCombineModeProperty =
+            AvaloniaProperty.Register<CombinedGeometry, GeometryCombineMode>(nameof(GeometryCombineMode));
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CombinedGeometry"/> class.
+        /// </summary>
+        public CombinedGeometry()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CombinedGeometry"/> class with the
+        /// specified <see cref="Geometry"/> objects.
+        /// </summary>
+        /// <param name="geometry1">The first geometry to combine.</param>
+        /// <param name="geometry2">The second geometry to combine.</param>
+        public CombinedGeometry(Geometry geometry1, Geometry geometry2)
+        {
+            Geometry1 = geometry1;
+            Geometry2 = geometry2;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CombinedGeometry"/> class with the
+        /// specified <see cref="Geometry"/> objects and <see cref="GeometryCombineMode"/>.
+        /// </summary>
+        /// <param name="combineMode">The method by which geometry1 and geometry2 are combined.</param>
+        /// <param name="geometry1">The first geometry to combine.</param>
+        /// <param name="geometry2">The second geometry to combine.</param>
+        public CombinedGeometry(GeometryCombineMode combineMode, Geometry? geometry1, Geometry? geometry2)
+        {
+            Geometry1 = geometry1;
+            Geometry2 = geometry2;
+            GeometryCombineMode = combineMode;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CombinedGeometry"/> class with the
+        /// specified <see cref="Geometry"/> objects, <see cref="GeometryCombineMode"/> and
+        /// <see cref="Transform"/>.
+        /// </summary>
+        /// <param name="combineMode">The method by which geometry1 and geometry2 are combined.</param>
+        /// <param name="geometry1">The first geometry to combine.</param>
+        /// <param name="geometry2">The second geometry to combine.</param>
+        /// <param name="transform">The transform applied to the geometry.</param>
+        public CombinedGeometry(
+            GeometryCombineMode combineMode,
+            Geometry? geometry1,
+            Geometry? geometry2,
+            Transform? transform)
+        {
+            Geometry1 = geometry1;
+            Geometry2 = geometry2;
+            GeometryCombineMode = combineMode;
+            Transform = transform;
+        }
+
+        /// <summary>
+        /// Gets or sets the first <see cref="Geometry"/> object of this
+        /// <see cref="CombinedGeometry"/> object.
+        /// </summary>
+        public Geometry? Geometry1
+        {
+            get => GetValue(Geometry1Property);
+            set => SetValue(Geometry1Property, value);
+        }
+
+        /// <summary>
+        /// Gets or sets the second <see cref="Geometry"/> object of this
+        /// <see cref="CombinedGeometry"/> object.
+        /// </summary>
+        public Geometry? Geometry2
+        {
+            get => GetValue(Geometry2Property);
+            set => SetValue(Geometry2Property, value);
+        }
+
+        /// <summary>
+        /// Gets or sets the method by which the two geometries (specified by the
+        /// <see cref="Geometry1"/> and <see cref="Geometry2"/> properties) are combined. The
+        /// default value is <see cref="GeometryCombineMode.Union"/>.
+        /// </summary>
+        public GeometryCombineMode GeometryCombineMode
+        {
+            get => GetValue(GeometryCombineModeProperty);
+            set => SetValue(GeometryCombineModeProperty, value);
+        }
+
+        public override Geometry Clone()
+        {
+            return new CombinedGeometry(GeometryCombineMode, Geometry1, Geometry2, Transform);
+        }
+
+        protected override IGeometryImpl? CreateDefiningGeometry()
+        {
+            var g1 = Geometry1;
+            var g2 = Geometry2;
+
+            if (g1 is object && g2 is object)
+            {
+                var factory = AvaloniaLocator.Current.GetService<IPlatformRenderInterface>();
+                return factory.CreateCombinedGeometry(GeometryCombineMode, g1, g2);
+            }
+            else if (GeometryCombineMode == GeometryCombineMode.Intersect)
+                return null;
+            else if (g1 is object)
+                return g1.PlatformImpl;
+            else if (g2 is object)
+                return g2.PlatformImpl;
+            else
+                return null;
+        }
+    }
+}
diff --git a/src/Avalonia.Visuals/Media/FormattedText.cs b/src/Avalonia.Visuals/Media/FormattedText.cs
index a843be4c4b..ddffbe7500 100644
--- a/src/Avalonia.Visuals/Media/FormattedText.cs
+++ b/src/Avalonia.Visuals/Media/FormattedText.cs
@@ -200,7 +200,7 @@ namespace Avalonia.Media
 
         private void Set<T>(ref T field, T value)
         {
-            if (field != null && field.Equals(value))
+            if (EqualityComparer<T>.Default.Equals(field, value))
             {
                 return;
             }
diff --git a/src/Avalonia.Visuals/Media/GeometryCollection.cs b/src/Avalonia.Visuals/Media/GeometryCollection.cs
new file mode 100644
index 0000000000..0bd02d5438
--- /dev/null
+++ b/src/Avalonia.Visuals/Media/GeometryCollection.cs
@@ -0,0 +1,37 @@
+using System.Collections;
+using System.Collections.Generic;
+using Avalonia.Animation;
+
+#nullable enable
+
+namespace Avalonia.Media
+{
+    public class GeometryCollection : Animatable, IList<Geometry>, IReadOnlyList<Geometry>
+    {
+        private List<Geometry> _inner;
+
+        public GeometryCollection() => _inner = new List<Geometry>();
+        public GeometryCollection(IEnumerable<Geometry> collection) => _inner = new List<Geometry>(collection);
+        public GeometryCollection(int capacity) => _inner = new List<Geometry>(capacity);
+
+        public Geometry this[int index] 
+        { 
+            get => _inner[index];
+            set => _inner[index] = value; 
+        }
+
+        public int Count => _inner.Count;
+        public bool IsReadOnly => false;
+
+        public void Add(Geometry item) => _inner.Add(item);
+        public void Clear() => _inner.Clear();
+        public bool Contains(Geometry item) => _inner.Contains(item);
+        public void CopyTo(Geometry[] array, int arrayIndex) => _inner.CopyTo(array, arrayIndex);
+        public IEnumerator<Geometry> GetEnumerator() => _inner.GetEnumerator();
+        public int IndexOf(Geometry item) => _inner.IndexOf(item);
+        public void Insert(int index, Geometry item) => _inner.Insert(index, item);
+        public bool Remove(Geometry item) => _inner.Remove(item);
+        public void RemoveAt(int index) => _inner.RemoveAt(index);
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+    }
+}
diff --git a/src/Avalonia.Visuals/Media/GeometryGroup.cs b/src/Avalonia.Visuals/Media/GeometryGroup.cs
new file mode 100644
index 0000000000..edbe63d4bb
--- /dev/null
+++ b/src/Avalonia.Visuals/Media/GeometryGroup.cs
@@ -0,0 +1,80 @@
+using System.Collections.Generic;
+using System.Linq;
+using Avalonia.Metadata;
+using Avalonia.Platform;
+
+#nullable enable
+
+namespace Avalonia.Media
+{
+    /// <summary>
+    /// Represents a composite geometry, composed of other <see cref="Geometry"/> objects.
+    /// </summary>
+    public class GeometryGroup : Geometry
+    {
+        public static readonly DirectProperty<GeometryGroup, GeometryCollection?> ChildrenProperty =
+            AvaloniaProperty.RegisterDirect<GeometryGroup, GeometryCollection?> (
+                nameof(Children),
+                o => o.Children,
+                (o, v) => o.Children = v);
+
+        public static readonly StyledProperty<FillRule> FillRuleProperty =
+            AvaloniaProperty.Register<GeometryGroup, FillRule>(nameof(FillRule));
+
+        private GeometryCollection? _children;
+        private bool _childrenSet;
+
+        /// <summary>
+        /// Gets or sets the collection that contains the child geometries.
+        /// </summary>
+        [Content]
+        public GeometryCollection? Children
+        {
+            get => _children ??= (!_childrenSet ? new GeometryCollection() : null);
+            set
+            {
+                SetAndRaise(ChildrenProperty, ref _children, value);
+                _childrenSet = true;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets how the intersecting areas of the objects contained in this
+        /// <see cref="GeometryGroup"/> are combined. The default is <see cref="FillRule.EvenOdd"/>.
+        /// </summary>
+        public FillRule FillRule
+        {
+            get => GetValue(FillRuleProperty);
+            set => SetValue(FillRuleProperty, value);
+        }
+
+        public override Geometry Clone()
+        {
+            var result = new GeometryGroup { FillRule = FillRule, Transform = Transform };
+            if (_children?.Count > 0)
+                result.Children = new GeometryCollection(_children);
+            return result;
+        }
+
+        protected override IGeometryImpl? CreateDefiningGeometry()
+        {
+            if (_children?.Count > 0)
+            {
+                var factory = AvaloniaLocator.Current.GetService<IPlatformRenderInterface>();
+                return factory.CreateGeometryGroup(FillRule, _children);
+            }
+
+            return null;
+        }
+
+        protected override void OnPropertyChanged<T>(AvaloniaPropertyChangedEventArgs<T> change)
+        {
+            base.OnPropertyChanged(change);
+
+            if (change.Property == ChildrenProperty || change.Property == FillRuleProperty)
+            {
+                InvalidateGeometry();
+            }
+        }
+    }
+}
diff --git a/src/Avalonia.Visuals/Media/PathMarkupParser.cs b/src/Avalonia.Visuals/Media/PathMarkupParser.cs
index 9fefcb6645..8b9d0833db 100644
--- a/src/Avalonia.Visuals/Media/PathMarkupParser.cs
+++ b/src/Avalonia.Visuals/Media/PathMarkupParser.cs
@@ -496,12 +496,18 @@ namespace Avalonia.Media
 
         private bool ReadBool(ref ReadOnlySpan<char> span)
         {
-            if (!ReadArgument(ref span, out var boolValue) || boolValue.Length != 1)
+            span = SkipWhitespace(span);
+            
+            if (span.IsEmpty)
             {
                 throw new InvalidDataException("Invalid bool rule.");
             }
             
-            switch (boolValue[0])
+            var c = span[0];
+            
+            span = span.Slice(1);
+            
+            switch (c)
             {
                 case '0':
                     return false;
diff --git a/src/Avalonia.Visuals/Media/RotateTransform.cs b/src/Avalonia.Visuals/Media/RotateTransform.cs
index 653d38eb45..126bb7c274 100644
--- a/src/Avalonia.Visuals/Media/RotateTransform.cs
+++ b/src/Avalonia.Visuals/Media/RotateTransform.cs
@@ -14,6 +14,18 @@ namespace Avalonia.Media
         public static readonly StyledProperty<double> AngleProperty =
             AvaloniaProperty.Register<RotateTransform, double>(nameof(Angle));
 
+        /// <summary>
+        /// Defines the <see cref="CenterX"/> property.
+        /// </summary>
+        public static readonly StyledProperty<double> CenterXProperty =
+            AvaloniaProperty.Register<RotateTransform, double>(nameof(CenterX));
+
+        /// <summary>
+        /// Defines the <see cref="CenterY"/> property.
+        /// </summary>
+        public static readonly StyledProperty<double> CenterYProperty =
+            AvaloniaProperty.Register<RotateTransform, double>(nameof(CenterY));
+
         /// <summary>
         /// Initializes a new instance of the <see cref="RotateTransform"/> class.
         /// </summary>
@@ -32,18 +44,52 @@ namespace Avalonia.Media
             Angle = angle;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RotateTransform"/> class.
+        /// </summary>
+        /// <param name="angle">The angle, in degrees.</param>
+        /// <param name="centerX">The x-coordinate of the center point for the rotation.</param>
+        /// <param name="centerY">The y-coordinate of the center point for the rotation.</param>
+        public RotateTransform(double angle, double centerX, double centerY)
+            : this()
+        {
+            Angle = angle;
+            CenterX = centerX;
+            CenterY = centerY;
+        }
+
         /// <summary>
         /// Gets or sets the angle of rotation, in degrees.
         /// </summary>
         public double Angle
         {
-            get { return GetValue(AngleProperty); }
-            set { SetValue(AngleProperty, value); }
+            get => GetValue(AngleProperty);
+            set => SetValue(AngleProperty, value);
+        }
+
+        /// <summary>
+        /// Gets or sets the x-coordinate of the rotation center point. The default is 0.
+        /// </summary>
+        public double CenterX
+        {
+            get => GetValue(CenterXProperty);
+            set => SetValue(CenterXProperty, value);
+        }
+
+        /// <summary>
+        /// Gets or sets the y-coordinate of the rotation center point. The default is 0.
+        /// </summary>
+        public double CenterY
+        {
+            get => GetValue(CenterYProperty);
+            set => SetValue(CenterYProperty, value);
         }
 
         /// <summary>
         /// Gets the transform's <see cref="Matrix"/>.
         /// </summary>
-        public override Matrix Value => Matrix.CreateRotation(Matrix.ToRadians(Angle));
+        public override Matrix Value => Matrix.CreateTranslation(-CenterX, -CenterY) *
+            Matrix.CreateRotation(Matrix.ToRadians(Angle)) *
+            Matrix.CreateTranslation(CenterX, CenterY);
     }
 }
diff --git a/src/Avalonia.Visuals/Platform/IPlatformRenderInterface.cs b/src/Avalonia.Visuals/Platform/IPlatformRenderInterface.cs
index de67aca5a8..772f1ac9f3 100644
--- a/src/Avalonia.Visuals/Platform/IPlatformRenderInterface.cs
+++ b/src/Avalonia.Visuals/Platform/IPlatformRenderInterface.cs
@@ -59,6 +59,23 @@ namespace Avalonia.Platform
         /// <returns>An <see cref="IStreamGeometryImpl"/>.</returns>
         IStreamGeometryImpl CreateStreamGeometry();
 
+        /// <summary>
+        /// Creates a geometry group implementation.
+        /// </summary>
+        /// <param name="fillRule">The fill rule.</param>
+        /// <param name="children">The geometries to group.</param>
+        /// <returns>A combined geometry.</returns>
+        IGeometryImpl CreateGeometryGroup(FillRule fillRule, IReadOnlyList<Geometry> children);
+
+        /// <summary>
+        /// Creates a geometry group implementation.
+        /// </summary>
+        /// <param name="combineMode">The combine mode</param>
+        /// <param name="g1">The first geometry.</param>
+        /// <param name="g2">The second geometry.</param>
+        /// <returns>A combined geometry.</returns>
+        IGeometryImpl CreateCombinedGeometry(GeometryCombineMode combineMode, Geometry g1, Geometry g2);
+
         /// <summary>
         /// Creates a renderer.
         /// </summary>
diff --git a/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs b/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs
index 3bd8e05ee2..6c84cfd55c 100644
--- a/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs
+++ b/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs
@@ -35,6 +35,8 @@ namespace Avalonia.Rendering
         private IRef<IDrawOperation> _currentDraw;
         private readonly IDeferredRendererLock _lock;
         private readonly object _sceneLock = new object();
+        private readonly object _startStopLock = new object();
+        private readonly object _renderLoopIsRenderingLock = new object();
         private readonly Action _updateSceneIfNeededDelegate;
 
         /// <summary>
@@ -139,6 +141,8 @@ namespace Avalonia.Rendering
             }
 
             Stop();
+            // Wait for any in-progress rendering to complete
+            lock(_renderLoopIsRenderingLock){}
             DisposeRenderTarget();
         }
 
@@ -233,20 +237,26 @@ namespace Avalonia.Rendering
         /// <inheritdoc/>
         public void Start()
         {
-            if (!_running && _renderLoop != null)
+            lock (_startStopLock)
             {
-                _renderLoop.Add(this);
-                _running = true;
+                if (!_running && _renderLoop != null)
+                {
+                    _renderLoop.Add(this);
+                    _running = true;
+                }
             }
         }
 
         /// <inheritdoc/>
         public void Stop()
         {
-            if (_running && _renderLoop != null)
+            lock (_startStopLock)
             {
-                _renderLoop.Remove(this);
-                _running = false;
+                if (_running && _renderLoop != null)
+                {
+                    _renderLoop.Remove(this);
+                    _running = false;
+                }
             }
         }
 
@@ -255,7 +265,16 @@ namespace Avalonia.Rendering
 
         void IRenderLoopTask.Update(TimeSpan time) => UpdateScene();
 
-        void IRenderLoopTask.Render() => Render(false);
+        void IRenderLoopTask.Render()
+        {
+            lock (_renderLoopIsRenderingLock)
+            {
+                lock(_startStopLock)
+                    if(!_running)
+                        return;
+                Render(false);
+            }
+        }
 
         /// <inheritdoc/>
         Size IVisualBrushRenderer.GetRenderTargetSize(IVisualBrush brush)
diff --git a/src/Avalonia.Visuals/Rendering/ImmediateRenderer.cs b/src/Avalonia.Visuals/Rendering/ImmediateRenderer.cs
index 85feb06c44..52427c4ae6 100644
--- a/src/Avalonia.Visuals/Rendering/ImmediateRenderer.cs
+++ b/src/Avalonia.Visuals/Rendering/ImmediateRenderer.cs
@@ -289,11 +289,14 @@ namespace Avalonia.Rendering
 
                 using (context.PushPostTransform(m))
                 using (context.PushOpacity(opacity))
-                using (clipToBounds 
-                    ? visual is IVisualWithRoundRectClip roundClipVisual 
+                using (clipToBounds
+#pragma warning disable CS0618 // Type or member is obsolete
+                    ? visual is IVisualWithRoundRectClip roundClipVisual
                         ? context.PushClip(new RoundedRect(bounds, roundClipVisual.ClipToBoundsRadius))
                         : context.PushClip(bounds) 
                     : default(DrawingContext.PushedState))
+#pragma warning restore CS0618 // Type or member is obsolete
+
                 using (visual.Clip != null ? context.PushGeometryClip(visual.Clip) : default(DrawingContext.PushedState))
                 using (visual.OpacityMask != null ? context.PushOpacityMask(visual.OpacityMask, bounds) : default(DrawingContext.PushedState))
                 using (context.PushTransformContainer())
diff --git a/src/Avalonia.Visuals/Rendering/SceneGraph/CustomDrawOperation.cs b/src/Avalonia.Visuals/Rendering/SceneGraph/CustomDrawOperation.cs
index 15e5660671..b7311936d3 100644
--- a/src/Avalonia.Visuals/Rendering/SceneGraph/CustomDrawOperation.cs
+++ b/src/Avalonia.Visuals/Rendering/SceneGraph/CustomDrawOperation.cs
@@ -17,7 +17,12 @@ namespace Avalonia.Rendering.SceneGraph
 
         public override bool HitTest(Point p)
         {
-            return Custom.HitTest(p * Transform);
+            if (Transform.HasInverse)
+            {
+                return Custom.HitTest(p * Transform.Invert());
+            }
+
+            return false;
         }
 
         public override void Render(IDrawingContextImpl context)
diff --git a/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs b/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
index c6cdf474bb..b9131c26f4 100644
--- a/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
+++ b/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
@@ -164,10 +164,12 @@ namespace Avalonia.Rendering.SceneGraph
             var visual = node.Visual;
             var opacity = visual.Opacity;
             var clipToBounds = visual.ClipToBounds;
+#pragma warning disable CS0618 // Type or member is obsolete
             var clipToBoundsRadius = visual is IVisualWithRoundRectClip roundRectClip ?
                 roundRectClip.ClipToBoundsRadius :
                 default;
-            
+#pragma warning restore CS0618 // Type or member is obsolete
+
             var bounds = new Rect(visual.Bounds.Size);
             var contextImpl = (DeferredDrawingContextImpl)context.PlatformImpl;
 
diff --git a/src/Avalonia.Visuals/Vector.cs b/src/Avalonia.Visuals/Vector.cs
index 79c4202be4..810530066f 100644
--- a/src/Avalonia.Visuals/Vector.cs
+++ b/src/Avalonia.Visuals/Vector.cs
@@ -175,7 +175,7 @@ namespace Avalonia
                    MathUtilities.AreClose(_y, other._y);
         }
 
-        public override bool Equals(object obj) => obj is Vector other && Equals(other);
+        public override bool Equals(object? obj) => obj is Vector other && Equals(other);
 
         public override int GetHashCode()
         {
diff --git a/src/Avalonia.Visuals/Visual.cs b/src/Avalonia.Visuals/Visual.cs
index 2c96d87bb6..322b630e83 100644
--- a/src/Avalonia.Visuals/Visual.cs
+++ b/src/Avalonia.Visuals/Visual.cs
@@ -489,11 +489,8 @@ namespace Avalonia
 
         protected internal sealed override void LogBindingError(AvaloniaProperty property, Exception e)
         {
-            // Don't log a binding error unless the control is attached to a logical or visual tree.
-            // In theory this should only need to check for logical tree attachment, but in practise
-            // due to ContentControlMixin only taking effect when the template has finished being
-            // applied, some controls are attached to the visual tree before the logical tree.
-            if (((ILogical)this).IsAttachedToLogicalTree || ((IVisual)this).IsAttachedToVisualTree)
+            // Don't log a binding error unless the control is attached to a logical tree.
+            if (((ILogical)this).IsAttachedToLogicalTree)
             {
                 if (e is BindingChainException b &&
                     string.IsNullOrEmpty(b.ExpressionErrorPoint) &&
diff --git a/src/Avalonia.X11/X11Window.cs b/src/Avalonia.X11/X11Window.cs
index 149d7fb9b2..14645bc415 100644
--- a/src/Avalonia.X11/X11Window.cs
+++ b/src/Avalonia.X11/X11Window.cs
@@ -192,11 +192,6 @@ namespace Avalonia.X11
             if (platform.Options.UseDBusMenu)
                 NativeMenuExporter = DBusMenuExporter.TryCreate(_handle);
             NativeControlHost = new X11NativeControlHost(_platform, this);
-            DispatcherTimer.Run(() =>
-            {
-                Paint?.Invoke(default);
-                return _handle != IntPtr.Zero;
-            }, TimeSpan.FromMilliseconds(100));
             InitializeIme();
         }
 
@@ -805,13 +800,14 @@ namespace Avalonia.X11
             
             if (_handle != IntPtr.Zero)
             {
-                XDestroyWindow(_x11.Display, _handle);
                 _platform.Windows.Remove(_handle);
                 _platform.XI2?.OnWindowDestroyed(_handle);
+                var handle = _handle;
                 _handle = IntPtr.Zero;
                 Closed?.Invoke();
                 _mouse.Dispose();
                 _touch.Dispose();
+                XDestroyWindow(_x11.Display, handle);
             }
             
             if (_useRenderWindow && _renderHandle != IntPtr.Zero)
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/FramebufferToplevelImpl.cs b/src/Linux/Avalonia.LinuxFramebuffer/FramebufferToplevelImpl.cs
index b097e0917f..8688671d3b 100644
--- a/src/Linux/Avalonia.LinuxFramebuffer/FramebufferToplevelImpl.cs
+++ b/src/Linux/Avalonia.LinuxFramebuffer/FramebufferToplevelImpl.cs
@@ -30,10 +30,9 @@ namespace Avalonia.LinuxFramebuffer
 
         public IRenderer CreateRenderer(IRenderRoot root)
         {
-            return new DeferredRenderer(root, AvaloniaLocator.Current.GetService<IRenderLoop>())
-            {
-                
-            };
+            var factory = AvaloniaLocator.Current.GetService<IRendererFactory>();
+            var renderLoop = AvaloniaLocator.Current.GetService<IRenderLoop>();
+            return factory?.Create(root, renderLoop) ?? new DeferredRenderer(root, renderLoop);
         }
 
         public void Dispose()
@@ -41,7 +40,7 @@ namespace Avalonia.LinuxFramebuffer
             throw new NotSupportedException();
         }
 
-        
+
         public void Invalidate(Rect rect)
         {
         }
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs
index 89f81a7649..f4db6bf48a 100644
--- a/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs
+++ b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs
@@ -37,16 +37,17 @@ namespace Avalonia.LinuxFramebuffer
             Threading = new InternalPlatformThreadingInterface();
             if (_fb is IGlOutputBackend gl)
                 AvaloniaLocator.CurrentMutable.Bind<IPlatformOpenGlInterface>().ToConstant(gl.PlatformOpenGlInterface);
+            
+            var opts = AvaloniaLocator.Current.GetService<LinuxFramebufferPlatformOptions>();
+            
             AvaloniaLocator.CurrentMutable
                 .Bind<IPlatformThreadingInterface>().ToConstant(Threading)
-                .Bind<IRenderTimer>().ToConstant(new DefaultRenderTimer(60))
+                .Bind<IRenderTimer>().ToConstant(new DefaultRenderTimer(opts?.Fps ?? 60))
                 .Bind<IRenderLoop>().ToConstant(new RenderLoop())
                 .Bind<ICursorFactory>().ToTransient<CursorFactoryStub>()
                 .Bind<IKeyboardDevice>().ToConstant(new KeyboardDevice())
                 .Bind<IPlatformSettings>().ToSingleton<PlatformSettings>()
-                .Bind<IRenderLoop>().ToConstant(new RenderLoop())
                 .Bind<PlatformHotkeyConfiguration>().ToSingleton<PlatformHotkeyConfiguration>();
-
         }
 
        
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatformOptions.cs b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatformOptions.cs
new file mode 100644
index 0000000000..bf925bbd75
--- /dev/null
+++ b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatformOptions.cs
@@ -0,0 +1,14 @@
+namespace Avalonia.LinuxFramebuffer
+{
+    /// <summary>
+    /// Platform-specific options which apply to the Linux framebuffer.
+    /// </summary>
+    public class LinuxFramebufferPlatformOptions
+    {
+        /// <summary>
+        /// Gets or sets the number of frames per second at which the renderer should run.
+        /// Default 60.
+        /// </summary>
+        public int Fps { get; set; } = 60;
+    }
+}
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/LockedFramebuffer.cs b/src/Linux/Avalonia.LinuxFramebuffer/LockedFramebuffer.cs
deleted file mode 100644
index 87c7b64c26..0000000000
--- a/src/Linux/Avalonia.LinuxFramebuffer/LockedFramebuffer.cs
+++ /dev/null
@@ -1,46 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-using Avalonia.Platform;
-
-namespace Avalonia.LinuxFramebuffer
-{
-    unsafe class LockedFramebuffer : ILockedFramebuffer
-    {
-        private readonly int _fb;
-        private readonly fb_fix_screeninfo _fixedInfo;
-        private fb_var_screeninfo _varInfo;
-        private readonly IntPtr _address;
-
-        public LockedFramebuffer(int fb, fb_fix_screeninfo fixedInfo, fb_var_screeninfo varInfo, IntPtr address, Vector dpi)
-        {
-            _fb = fb;
-            _fixedInfo = fixedInfo;
-            _varInfo = varInfo;
-            _address = address;
-            Dpi = dpi;
-            //Use double buffering to avoid flicker
-            Address = Marshal.AllocHGlobal(RowBytes * Size.Height);
-        }
-
-
-        void VSync()
-        {
-            NativeUnsafeMethods.ioctl(_fb, FbIoCtl.FBIO_WAITFORVSYNC, null);
-        }
-
-        public void Dispose()
-        {
-            VSync();
-            NativeUnsafeMethods.memcpy(_address, Address, new IntPtr(RowBytes * Size.Height));
-
-            Marshal.FreeHGlobal(Address);
-            Address = IntPtr.Zero;
-        }
-
-        public IntPtr Address { get; private set; }
-        public PixelSize Size => new PixelSize((int)_varInfo.xres, (int) _varInfo.yres);
-        public int RowBytes => (int) _fixedInfo.line_length;
-        public Vector Dpi { get; }
-        public PixelFormat Format => _varInfo.bits_per_pixel == 16 ? PixelFormat.Rgb565 : _varInfo.blue.offset == 16 ? PixelFormat.Rgba8888 : PixelFormat.Bgra8888;
-    }
-}
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/Output/FbDevBackBuffer.cs b/src/Linux/Avalonia.LinuxFramebuffer/Output/FbDevBackBuffer.cs
new file mode 100644
index 0000000000..7afad13bb6
--- /dev/null
+++ b/src/Linux/Avalonia.LinuxFramebuffer/Output/FbDevBackBuffer.cs
@@ -0,0 +1,70 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+using Avalonia.Platform;
+
+namespace Avalonia.LinuxFramebuffer.Output
+{
+    internal unsafe class FbDevBackBuffer : IDisposable
+    {
+        private readonly int _fb;
+        private readonly fb_fix_screeninfo _fixedInfo;
+        private readonly fb_var_screeninfo _varInfo;
+        private readonly IntPtr _targetAddress;
+        private readonly object _lock = new object();
+
+        public FbDevBackBuffer(int fb, fb_fix_screeninfo fixedInfo, fb_var_screeninfo varInfo, IntPtr targetAddress)
+        {
+            _fb = fb;
+            _fixedInfo = fixedInfo;
+            _varInfo = varInfo;
+            _targetAddress = targetAddress;
+            Address = Marshal.AllocHGlobal(RowBytes * Size.Height);
+        }
+        
+
+        public void Dispose()
+        {
+            if (Address != IntPtr.Zero)
+            {
+                Marshal.FreeHGlobal(Address);
+                Address = IntPtr.Zero;
+            }
+        }
+
+        public ILockedFramebuffer Lock(Vector dpi)
+        {
+            Monitor.Enter(_lock);
+            try
+            {
+                return new LockedFramebuffer(Address,
+                    new PixelSize((int)_varInfo.xres, (int)_varInfo.yres),
+                    (int)_fixedInfo.line_length, dpi,
+                    _varInfo.bits_per_pixel == 16 ? PixelFormat.Rgb565
+                    : _varInfo.blue.offset == 16 ? PixelFormat.Rgba8888
+                    : PixelFormat.Bgra8888,
+                    () =>
+                    {
+                        try
+                        {
+                            NativeUnsafeMethods.ioctl(_fb, FbIoCtl.FBIO_WAITFORVSYNC, null);
+                            NativeUnsafeMethods.memcpy(_targetAddress, Address, new IntPtr(RowBytes * Size.Height));
+                        }
+                        finally
+                        {
+                            Monitor.Exit(_lock);
+                        }
+                    });
+            }
+            catch
+            {
+                Monitor.Exit(_lock);
+                throw;
+            }
+        }
+
+        public IntPtr Address { get; private set; }
+        public PixelSize Size => new PixelSize((int)_varInfo.xres, (int) _varInfo.yres);
+        public int RowBytes => (int) _fixedInfo.line_length;
+    }
+}
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/Output/FbdevOutput.cs b/src/Linux/Avalonia.LinuxFramebuffer/Output/FbdevOutput.cs
index 61f00b2795..f3f9a12ac8 100644
--- a/src/Linux/Avalonia.LinuxFramebuffer/Output/FbdevOutput.cs
+++ b/src/Linux/Avalonia.LinuxFramebuffer/Output/FbdevOutput.cs
@@ -14,6 +14,7 @@ namespace Avalonia.LinuxFramebuffer
         private fb_var_screeninfo _varInfo;
         private IntPtr _mappedLength;
         private IntPtr _mappedAddress;
+        private FbDevBackBuffer _backBuffer;
         public double Scaling { get; set; }
 
         /// <summary>
@@ -146,7 +147,9 @@ namespace Avalonia.LinuxFramebuffer
         {
             if (_fd <= 0)
                 throw new ObjectDisposedException("LinuxFramebuffer");
-            return new LockedFramebuffer(_fd, _fixedInfo, _varInfo, _mappedAddress, new Vector(96, 96) * Scaling);
+            return (_backBuffer ??=
+                    new FbDevBackBuffer(_fd, _fixedInfo, _varInfo, _mappedAddress))
+                .Lock(new Vector(96, 96) * Scaling);
         }
 
 
@@ -165,6 +168,8 @@ namespace Avalonia.LinuxFramebuffer
 
         public void Dispose()
         {
+            _backBuffer?.Dispose();
+            _backBuffer = null;
             ReleaseUnmanagedResources();
             GC.SuppressFinalize(this);
         }
diff --git a/src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/AvaloniaXamlIlCompiler.cs b/src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/AvaloniaXamlIlCompiler.cs
index a191dc59fb..1ca7be67a7 100644
--- a/src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/AvaloniaXamlIlCompiler.cs
+++ b/src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/AvaloniaXamlIlCompiler.cs
@@ -14,7 +14,6 @@ namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions
 {
     class AvaloniaXamlIlCompiler : XamlILCompiler
     {
-        private readonly TransformerConfiguration _configuration;
         private readonly IXamlType _contextType;
         private readonly AvaloniaXamlIlDesignPropertiesTransformer _designTransformer;
         private readonly AvaloniaBindingExtensionTransformer _bindingTransformer;
@@ -22,8 +21,6 @@ namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions
         private AvaloniaXamlIlCompiler(TransformerConfiguration configuration, XamlLanguageEmitMappings<IXamlILEmitter, XamlILNodeEmitResult> emitMappings)
             : base(configuration, emitMappings, true)
         {
-            _configuration = configuration;
-
             void InsertAfter<T>(params IXamlAstTransformer[] t) 
                 => Transformers.InsertRange(Transformers.FindIndex(x => x is T) + 1, t);
 
diff --git a/src/Markup/Avalonia.Markup.Xaml/Extensions.cs b/src/Markup/Avalonia.Markup.Xaml/Extensions.cs
index fe3fd44c1c..263750c316 100644
--- a/src/Markup/Avalonia.Markup.Xaml/Extensions.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/Extensions.cs
@@ -2,7 +2,9 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
+using Avalonia.Controls;
 using Avalonia.Markup.Xaml.XamlIl.Runtime;
+using Avalonia.Styling;
 
 namespace Avalonia.Markup.Xaml
 {
@@ -32,5 +34,26 @@ namespace Avalonia.Markup.Xaml
             string name = string.IsNullOrEmpty(namespacePrefix) ? type : $"{namespacePrefix}:{type}";
             return tr?.Resolve(name);
         }
+        
+        public static object GetDefaultAnchor(this IServiceProvider provider)
+        {
+            // If the target is not a control, so we need to find an anchor that will let us look
+            // up named controls and style resources. First look for the closest IControl in
+            // the context.
+            object anchor = provider.GetFirstParent<IControl>();
+
+            if (anchor is null)
+            {
+                // Try to find IDataContextProvider, this was added to allow us to find
+                // a datacontext for Application class when using NativeMenuItems.
+                anchor = provider.GetFirstParent<IDataContextProvider>();
+            }
+
+            // If a control was not found, then try to find the highest-level style as the XAML
+            // file could be a XAML file containing only styles.
+            return anchor ??
+                   provider.GetService<IRootObjectProvider>()?.RootObject as IStyle ??
+                   provider.GetLastParent<IStyle>();
+        }
     }
 }
diff --git a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindingExtension.cs b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindingExtension.cs
index 17d2ea7ae9..41de2355aa 100644
--- a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindingExtension.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/CompiledBindingExtension.cs
@@ -1,7 +1,5 @@
 using System;
 using Avalonia.Data;
-using Avalonia.Controls;
-using Avalonia.Styling;
 using Avalonia.Markup.Xaml.MarkupExtensions.CompiledBindings;
 using Avalonia.Data.Core;
 using Avalonia.Markup.Parsers;
@@ -33,24 +31,10 @@ namespace Avalonia.Markup.Xaml.MarkupExtensions
                 Priority = Priority,
                 StringFormat = StringFormat,
                 Source = Source,
-                DefaultAnchor = new WeakReference(GetDefaultAnchor(provider))
+                DefaultAnchor = new WeakReference(provider.GetDefaultAnchor())
             };
         }
 
-        private static object GetDefaultAnchor(IServiceProvider provider)
-        {
-            // If the target is not a control, so we need to find an anchor that will let us look
-            // up named controls and style resources. First look for the closest IControl in
-            // the context.
-            object anchor = provider.GetFirstParent<IControl>();
-
-            // If a control was not found, then try to find the highest-level style as the XAML
-            // file could be a XAML file containing only styles.
-            return anchor ??
-                    provider.GetService<IRootObjectProvider>()?.RootObject as IStyle ??
-                    provider.GetLastParent<IStyle>();
-        }
-
         protected override ExpressionObserver CreateExpressionObserver(IAvaloniaObject target, AvaloniaProperty targetProperty, object anchor, bool enableDataValidation)
         {
             if (Source != null)
diff --git a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ReflectionBindingExtension.cs b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ReflectionBindingExtension.cs
index 10770365a3..d373ed852a 100644
--- a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ReflectionBindingExtension.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/ReflectionBindingExtension.cs
@@ -37,33 +37,12 @@ namespace Avalonia.Markup.Xaml.MarkupExtensions
                 Source = Source,
                 StringFormat = StringFormat,
                 RelativeSource = RelativeSource,
-                DefaultAnchor = new WeakReference(GetDefaultAnchor(descriptorContext)),
+                DefaultAnchor = new WeakReference(descriptorContext.GetDefaultAnchor()),
                 TargetNullValue = TargetNullValue,
                 NameScope = new WeakReference<INameScope>(serviceProvider.GetService<INameScope>())
             };
         }
 
-        private static object GetDefaultAnchor(IServiceProvider context)
-        {
-            // If the target is not a control, so we need to find an anchor that will let us look
-            // up named controls and style resources. First look for the closest IControl in
-            // the context.
-            object anchor = context.GetFirstParent<IControl>();
-
-            if(anchor is null)
-            {
-                // Try to find IDataContextProvider, this was added to allow us to find
-                // a datacontext for Application class when using NativeMenuItems.
-                anchor = context.GetFirstParent<IDataContextProvider>();
-            }
-
-            // If a control was not found, then try to find the highest-level style as the XAML
-            // file could be a XAML file containing only styles.
-            return anchor ??
-                    context.GetService<IRootObjectProvider>()?.RootObject as IStyle ??
-                    context.GetLastParent<IStyle>();
-        }
-
         public IValueConverter Converter { get; set; }
 
         public object ConverterParameter { get; set; }
diff --git a/src/Markup/Avalonia.Markup/Markup/Parsers/PropertyPathGrammar.cs b/src/Markup/Avalonia.Markup/Markup/Parsers/PropertyPathGrammar.cs
index 250eca1852..bf11a02fee 100644
--- a/src/Markup/Avalonia.Markup/Markup/Parsers/PropertyPathGrammar.cs
+++ b/src/Markup/Avalonia.Markup/Markup/Parsers/PropertyPathGrammar.cs
@@ -184,6 +184,9 @@ namespace Avalonia.Markup.Parsers
             
         }
 
+        // Don't need to override GetHashCode as the ISyntax objects will not be stored in a hash; the 
+        // only reason they have overridden Equals methods is for unit testing.
+#pragma warning disable CS0659 // Type overrides Object.Equals(object o) but does not override Object.GetHashCode()
         public class PropertySyntax : ISyntax
         {
             public string Name { get; set; } = string.Empty;
@@ -205,7 +208,7 @@ namespace Avalonia.Markup.Parsers
                    && other.TypeName == TypeName
                    && other.TypeNamespace == TypeNamespace;
         }
-        
+
         public class ChildTraversalSyntax : ISyntax
         {
             public static ChildTraversalSyntax Instance { get;  } = new ChildTraversalSyntax();
@@ -231,5 +234,6 @@ namespace Avalonia.Markup.Parsers
                    && other.TypeName == TypeName
                    && other.TypeNamespace == TypeNamespace;
         }
+#pragma warning restore CS0659 // Type overrides Object.Equals(object o) but does not override Object.GetHashCode()
     }
 }
diff --git a/src/Skia/Avalonia.Skia/CombinedGeometryImpl.cs b/src/Skia/Avalonia.Skia/CombinedGeometryImpl.cs
new file mode 100644
index 0000000000..40d7e10ae3
--- /dev/null
+++ b/src/Skia/Avalonia.Skia/CombinedGeometryImpl.cs
@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+using Avalonia.Media;
+using SkiaSharp;
+
+#nullable enable
+
+namespace Avalonia.Skia
+{
+    /// <summary>
+    /// A Skia implementation of a <see cref="Avalonia.Media.GeometryGroup"/>.
+    /// </summary>
+    internal class CombinedGeometryImpl : GeometryImpl
+    {
+        public CombinedGeometryImpl(GeometryCombineMode combineMode, Geometry g1, Geometry g2)
+        {
+            var path1 = ((GeometryImpl)g1.PlatformImpl).EffectivePath;
+            var path2 = ((GeometryImpl)g2.PlatformImpl).EffectivePath;
+            var op = combineMode switch
+            {
+                GeometryCombineMode.Intersect => SKPathOp.Intersect,
+                GeometryCombineMode.Xor => SKPathOp.Xor,
+                GeometryCombineMode.Exclude => SKPathOp.Difference,
+                _ => SKPathOp.Union,
+            };
+
+            var path = path1.Op(path2, op);
+
+            EffectivePath = path;
+            Bounds = path.Bounds.ToAvaloniaRect();
+        }
+
+        public override Rect Bounds { get; }
+        public override SKPath EffectivePath { get; }
+    }
+}
diff --git a/src/Skia/Avalonia.Skia/DrawingContextImpl.cs b/src/Skia/Avalonia.Skia/DrawingContextImpl.cs
index 1f186396ab..d812f6a059 100644
--- a/src/Skia/Avalonia.Skia/DrawingContextImpl.cs
+++ b/src/Skia/Avalonia.Skia/DrawingContextImpl.cs
@@ -164,7 +164,7 @@ namespace Avalonia.Skia
         /// <inheritdoc />
         public void DrawLine(IPen pen, Point p1, Point p2)
         {
-            using (var paint = CreatePaint(_strokePaint, pen, new Rect(p1, p2).Normalize()))
+            using (var paint = CreatePaint(_strokePaint, pen, new Size(Math.Abs(p2.X - p1.X), Math.Abs(p2.Y - p1.Y))))
             {
                 if (paint.Paint is object)
                 {
@@ -177,10 +177,10 @@ namespace Avalonia.Skia
         public void DrawGeometry(IBrush brush, IPen pen, IGeometryImpl geometry)
         {
             var impl = (GeometryImpl) geometry;
-            var rect = geometry.Bounds;
+            var size = geometry.Bounds.Size;
 
-            using (var fill = brush != null ? CreatePaint(_fillPaint, brush, rect) : default(PaintWrapper))
-            using (var stroke = pen?.Brush != null ? CreatePaint(_strokePaint, pen, rect) : default(PaintWrapper))
+            using (var fill = brush != null ? CreatePaint(_fillPaint, brush, size) : default(PaintWrapper))
+            using (var stroke = pen?.Brush != null ? CreatePaint(_strokePaint, pen, size) : default(PaintWrapper))
             {
                 if (fill.Paint != null)
                 {
@@ -354,7 +354,7 @@ namespace Avalonia.Skia
 
             if (brush != null)
             {
-                using (var paint = CreatePaint(_fillPaint, brush, rect.Rect))
+                using (var paint = CreatePaint(_fillPaint, brush, rect.Rect.Size))
                 {
                     if (isRounded)
                     {
@@ -397,7 +397,7 @@ namespace Avalonia.Skia
 
             if (pen?.Brush != null)
             {
-                using (var paint = CreatePaint(_strokePaint, pen, rect.Rect))
+                using (var paint = CreatePaint(_strokePaint, pen, rect.Rect.Size))
                 {
                     if (paint.Paint is object)
                     {
@@ -417,7 +417,7 @@ namespace Avalonia.Skia
         /// <inheritdoc />
         public void DrawText(IBrush foreground, Point origin, IFormattedTextImpl text)
         {
-            using (var paint = CreatePaint(_fillPaint, foreground, text.Bounds))
+            using (var paint = CreatePaint(_fillPaint, foreground, text.Bounds.Size))
             {
                 var textImpl = (FormattedTextImpl) text;
                 textImpl.Draw(this, Canvas, origin.ToSKPoint(), paint, _canTextUseLcdRendering);
@@ -427,7 +427,7 @@ namespace Avalonia.Skia
         /// <inheritdoc />
         public void DrawGlyphRun(IBrush foreground, GlyphRun glyphRun)
         {
-            using (var paintWrapper = CreatePaint(_fillPaint, foreground, new Rect(glyphRun.Size)))
+            using (var paintWrapper = CreatePaint(_fillPaint, foreground, glyphRun.Size))
             {
                 var glyphRunImpl = (GlyphRunImpl)glyphRun.GlyphRunImpl;
 
@@ -537,7 +537,7 @@ namespace Avalonia.Skia
             var paint = new SKPaint();
 
             Canvas.SaveLayer(paint);
-            _maskStack.Push(CreatePaint(paint, mask, bounds, true));
+            _maskStack.Push(CreatePaint(paint, mask, bounds.Size, true));
         }
 
         /// <inheritdoc />
@@ -593,19 +593,18 @@ namespace Avalonia.Skia
         /// <param name="paintWrapper">Paint wrapper.</param>
         /// <param name="targetRect">Target bound rect.</param>
         /// <param name="gradientBrush">Gradient brush.</param>
-        private void ConfigureGradientBrush(ref PaintWrapper paintWrapper, Rect targetRect, IGradientBrush gradientBrush)
+        private void ConfigureGradientBrush(ref PaintWrapper paintWrapper, Size targetSize, IGradientBrush gradientBrush)
         {
             var tileMode = gradientBrush.SpreadMethod.ToSKShaderTileMode();
             var stopColors = gradientBrush.GradientStops.Select(s => s.Color.ToSKColor()).ToArray();
             var stopOffsets = gradientBrush.GradientStops.Select(s => (float)s.Offset).ToArray();
-            var position = targetRect.Position.ToSKPoint();
 
             switch (gradientBrush)
             {
                 case ILinearGradientBrush linearGradient:
                 {
-                    var start = position + linearGradient.StartPoint.ToPixels(targetRect.Size).ToSKPoint();
-                    var end = position + linearGradient.EndPoint.ToPixels(targetRect.Size).ToSKPoint();
+                    var start = linearGradient.StartPoint.ToPixels(targetSize).ToSKPoint();
+                    var end = linearGradient.EndPoint.ToPixels(targetSize).ToSKPoint();
 
                     // would be nice to cache these shaders possibly?
                     using (var shader =
@@ -618,10 +617,10 @@ namespace Avalonia.Skia
                 }
                 case IRadialGradientBrush radialGradient:
                 {
-                    var center = position + radialGradient.Center.ToPixels(targetRect.Size).ToSKPoint();
-                    var radius = (float)(radialGradient.Radius * targetRect.Width);
+                    var center = radialGradient.Center.ToPixels(targetSize).ToSKPoint();
+                    var radius = (float)(radialGradient.Radius * targetSize.Width);
 
-                    var origin = position + radialGradient.GradientOrigin.ToPixels(targetRect.Size).ToSKPoint();
+                    var origin = radialGradient.GradientOrigin.ToPixels(targetSize).ToSKPoint();
 
                     if (origin.Equals(center))
                     {
@@ -666,7 +665,7 @@ namespace Avalonia.Skia
                 }
                 case IConicGradientBrush conicGradient:
                 {
-                    var center = position + conicGradient.Center.ToPixels(targetRect.Size).ToSKPoint();
+                    var center = conicGradient.Center.ToPixels(targetSize).ToSKPoint();
 
                     // Skia's default is that angle 0 is from the right hand side of the center point
                     // but we are matching CSS where the vertical point above the center is 0.
@@ -868,10 +867,10 @@ namespace Avalonia.Skia
         /// </summary>
         /// <param name="paint">The paint to wrap.</param>
         /// <param name="brush">Source brush.</param>
-        /// <param name="targetRect">Target rect.</param>
+        /// <param name="targetSize">Target size.</param>
         /// <param name="disposePaint">Optional dispose of the supplied paint.</param>
         /// <returns>Paint wrapper for given brush.</returns>
-        internal PaintWrapper CreatePaint(SKPaint paint, IBrush brush, Rect targetRect, bool disposePaint = false)
+        internal PaintWrapper CreatePaint(SKPaint paint, IBrush brush, Size targetSize, bool disposePaint = false)
         {
             var paintWrapper = new PaintWrapper(paint, disposePaint);
 
@@ -890,7 +889,7 @@ namespace Avalonia.Skia
 
             if (brush is IGradientBrush gradient)
             {
-                ConfigureGradientBrush(ref paintWrapper, targetRect, gradient);
+                ConfigureGradientBrush(ref paintWrapper, targetSize, gradient);
 
                 return paintWrapper;
             }
@@ -910,7 +909,7 @@ namespace Avalonia.Skia
 
             if (tileBrush != null && tileBrushImage != null)
             {
-                ConfigureTileBrush(ref paintWrapper, targetRect.Size, tileBrush, tileBrushImage);
+                ConfigureTileBrush(ref paintWrapper, targetSize, tileBrush, tileBrushImage);
             }
             else
             {
@@ -925,10 +924,10 @@ namespace Avalonia.Skia
         /// </summary>
         /// <param name="paint">The paint to wrap.</param>
         /// <param name="pen">Source pen.</param>
-        /// <param name="targetRect">Target rect.</param>
+        /// <param name="targetSize">Target size.</param>
         /// <param name="disposePaint">Optional dispose of the supplied paint.</param>
         /// <returns></returns>
-        private PaintWrapper CreatePaint(SKPaint paint, IPen pen, Rect targetRect, bool disposePaint = false)
+        private PaintWrapper CreatePaint(SKPaint paint, IPen pen, Size targetSize, bool disposePaint = false)
         {
             // In Skia 0 thickness means - use hairline rendering
             // and for us it means - there is nothing rendered.
@@ -937,7 +936,7 @@ namespace Avalonia.Skia
                 return default;
             }
 
-            var rv = CreatePaint(paint, pen.Brush, targetRect, disposePaint);
+            var rv = CreatePaint(paint, pen.Brush, targetSize, disposePaint);
 
             paint.IsStroke = true;
             paint.StrokeWidth = (float) pen.Thickness;
diff --git a/src/Skia/Avalonia.Skia/FormattedTextImpl.cs b/src/Skia/Avalonia.Skia/FormattedTextImpl.cs
index 3eca42faa9..5f4980e461 100644
--- a/src/Skia/Avalonia.Skia/FormattedTextImpl.cs
+++ b/src/Skia/Avalonia.Skia/FormattedTextImpl.cs
@@ -278,9 +278,9 @@ namespace Avalonia.Skia
 
                                 if (fb != null)
                                 {
-                                    //TODO: figure out how to get the brush rect
+                                    //TODO: figure out how to get the brush size
                                     currentWrapper = context.CreatePaint(new SKPaint { IsAntialias = true }, fb,
-                                        default);
+                                        new Size());
                                 }
                                 else
                                 {
diff --git a/src/Skia/Avalonia.Skia/GeometryGroupImpl.cs b/src/Skia/Avalonia.Skia/GeometryGroupImpl.cs
new file mode 100644
index 0000000000..d6f19612c1
--- /dev/null
+++ b/src/Skia/Avalonia.Skia/GeometryGroupImpl.cs
@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using Avalonia.Media;
+using SkiaSharp;
+
+#nullable enable
+
+namespace Avalonia.Skia
+{
+    /// <summary>
+    /// A Skia implementation of a <see cref="Avalonia.Media.GeometryGroup"/>.
+    /// </summary>
+    internal class GeometryGroupImpl : GeometryImpl
+    {
+        public GeometryGroupImpl(FillRule fillRule, IReadOnlyList<Geometry> children)
+        {
+            var path = new SKPath
+            {
+                FillType = fillRule == FillRule.NonZero ? SKPathFillType.Winding : SKPathFillType.EvenOdd,
+            };
+
+            var count = children.Count;
+            
+            for (var i = 0; i < count; ++i)
+            {
+                if (children[i]?.PlatformImpl is GeometryImpl child)
+                    path.AddPath(child.EffectivePath);
+            }
+
+            EffectivePath = path;
+            Bounds = path.Bounds.ToAvaloniaRect();
+        }
+
+        public override Rect Bounds { get; }
+        public override SKPath EffectivePath { get; }
+    }
+}
diff --git a/src/Skia/Avalonia.Skia/PlatformRenderInterface.cs b/src/Skia/Avalonia.Skia/PlatformRenderInterface.cs
index 7bc83ec85b..e2175f1145 100644
--- a/src/Skia/Avalonia.Skia/PlatformRenderInterface.cs
+++ b/src/Skia/Avalonia.Skia/PlatformRenderInterface.cs
@@ -62,6 +62,16 @@ namespace Avalonia.Skia
             return new StreamGeometryImpl();
         }
 
+        public IGeometryImpl CreateGeometryGroup(FillRule fillRule, IReadOnlyList<Geometry> children)
+        {
+            return new GeometryGroupImpl(fillRule, children);
+        }
+
+        public IGeometryImpl CreateCombinedGeometry(GeometryCombineMode combineMode, Geometry g1, Geometry g2)
+        {
+            return new CombinedGeometryImpl(combineMode, g1, g2);
+        }
+
         /// <inheritdoc />
         public IBitmapImpl LoadBitmap(string fileName)
         {
diff --git a/src/Windows/Avalonia.Direct2D1/Direct2D1Platform.cs b/src/Windows/Avalonia.Direct2D1/Direct2D1Platform.cs
index f50167b39a..eef4416101 100644
--- a/src/Windows/Avalonia.Direct2D1/Direct2D1Platform.cs
+++ b/src/Windows/Avalonia.Direct2D1/Direct2D1Platform.cs
@@ -175,6 +175,8 @@ namespace Avalonia.Direct2D1
         public IGeometryImpl CreateLineGeometry(Point p1, Point p2) => new LineGeometryImpl(p1, p2);
         public IGeometryImpl CreateRectangleGeometry(Rect rect) => new RectangleGeometryImpl(rect);
         public IStreamGeometryImpl CreateStreamGeometry() => new StreamGeometryImpl();
+        public IGeometryImpl CreateGeometryGroup(FillRule fillRule, IReadOnlyList<Geometry> children) => new GeometryGroupImpl(fillRule, children);
+        public IGeometryImpl CreateCombinedGeometry(GeometryCombineMode combineMode, Geometry g1, Geometry g2) => new CombinedGeometryImpl(combineMode, g1, g2);
 
         /// <inheritdoc />
         public IBitmapImpl LoadBitmap(string fileName)
diff --git a/src/Windows/Avalonia.Direct2D1/Media/AvaloniaTextRenderer.cs b/src/Windows/Avalonia.Direct2D1/Media/AvaloniaTextRenderer.cs
index e4b2405290..22c998df93 100644
--- a/src/Windows/Avalonia.Direct2D1/Media/AvaloniaTextRenderer.cs
+++ b/src/Windows/Avalonia.Direct2D1/Media/AvaloniaTextRenderer.cs
@@ -34,10 +34,10 @@ namespace Avalonia.Direct2D1.Media
         {
             var wrapper = clientDrawingEffect as BrushWrapper;
 
-            // TODO: Work out how to get the rect below rather than passing default.
+            // TODO: Work out how to get the size below rather than passing new Size().
             var brush = (wrapper == null) ?
                 _foreground :
-                _context.CreateBrush(wrapper.Brush, default).PlatformBrush;
+                _context.CreateBrush(wrapper.Brush, new Size()).PlatformBrush;
 
             _renderTarget.DrawGlyphRun(
                 new RawVector2 { X = baselineOriginX, Y = baselineOriginY },
diff --git a/src/Windows/Avalonia.Direct2D1/Media/CombinedGeometryImpl.cs b/src/Windows/Avalonia.Direct2D1/Media/CombinedGeometryImpl.cs
new file mode 100644
index 0000000000..5a13c10bbc
--- /dev/null
+++ b/src/Windows/Avalonia.Direct2D1/Media/CombinedGeometryImpl.cs
@@ -0,0 +1,36 @@
+using SharpDX.Direct2D1;
+using AM = Avalonia.Media;
+
+namespace Avalonia.Direct2D1.Media
+{
+    /// <summary>
+    /// A Direct2D implementation of a <see cref="Avalonia.Media.CombinedGeometry"/>.
+    /// </summary>
+    internal class CombinedGeometryImpl : GeometryImpl
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StreamGeometryImpl"/> class.
+        /// </summary>
+        public CombinedGeometryImpl(
+            AM.GeometryCombineMode combineMode,
+            AM.Geometry geometry1,
+            AM.Geometry geometry2)
+            : base(CreateGeometry(combineMode, geometry1, geometry2))
+        {
+        }
+
+        private static Geometry CreateGeometry(
+            AM.GeometryCombineMode combineMode,
+            AM.Geometry geometry1,
+            AM.Geometry geometry2)
+        {
+            var g1 = ((GeometryImpl)geometry1.PlatformImpl).Geometry;
+            var g2 = ((GeometryImpl)geometry2.PlatformImpl).Geometry;
+            var dest = new PathGeometry(Direct2D1Platform.Direct2D1Factory);
+            using var sink = dest.Open();
+            g1.Combine(g2, (CombineMode)combineMode, sink);
+            sink.Close();
+            return dest;
+        }
+    }
+}
diff --git a/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs b/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs
index 09e5b7c71a..622f47f953 100644
--- a/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs
+++ b/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs
@@ -192,7 +192,7 @@ namespace Avalonia.Direct2D1.Media
         {
             using (var d2dSource = ((BitmapImpl)source.Item).GetDirect2DBitmap(_deviceContext))
             using (var sourceBrush = new BitmapBrush(_deviceContext, d2dSource.Value))
-            using (var d2dOpacityMask = CreateBrush(opacityMask, opacityMaskRect))
+            using (var d2dOpacityMask = CreateBrush(opacityMask, opacityMaskRect.Size))
             using (var geometry = new SharpDX.Direct2D1.RectangleGeometry(Direct2D1Platform.Direct2D1Factory, destRect.ToDirect2D()))
             {
                 if (d2dOpacityMask.PlatformBrush != null)
@@ -217,7 +217,9 @@ namespace Avalonia.Direct2D1.Media
         {
             if (pen != null)
             {
-                using (var d2dBrush = CreateBrush(pen.Brush, new Rect(p1, p2).Normalize()))
+                var size = new Rect(p1, p2).Size;
+
+                using (var d2dBrush = CreateBrush(pen.Brush, size))
                 using (var d2dStroke = pen.ToDirect2DStrokeStyle(_deviceContext))
                 {
                     if (d2dBrush.PlatformBrush != null)
@@ -243,7 +245,7 @@ namespace Avalonia.Direct2D1.Media
         {
             if (brush != null)
             {
-                using (var d2dBrush = CreateBrush(brush, geometry.Bounds))
+                using (var d2dBrush = CreateBrush(brush, geometry.Bounds.Size))
                 {
                     if (d2dBrush.PlatformBrush != null)
                     {
@@ -255,7 +257,7 @@ namespace Avalonia.Direct2D1.Media
 
             if (pen != null)
             {
-                using (var d2dBrush = CreateBrush(pen.Brush, geometry.GetRenderBounds(pen)))
+                using (var d2dBrush = CreateBrush(pen.Brush, geometry.GetRenderBounds(pen).Size))
                 using (var d2dStroke = pen.ToDirect2DStrokeStyle(_deviceContext))
                 {
                     if (d2dBrush.PlatformBrush != null)
@@ -280,7 +282,7 @@ namespace Avalonia.Direct2D1.Media
 
             if (brush != null)
             {
-                using (var b = CreateBrush(brush, rect))
+                using (var b = CreateBrush(brush, rect.Size))
                 {
                     if (b.PlatformBrush != null)
                     {
@@ -309,7 +311,7 @@ namespace Avalonia.Direct2D1.Media
 
             if (pen?.Brush != null)
             {
-                using (var wrapper = CreateBrush(pen.Brush, rect))
+                using (var wrapper = CreateBrush(pen.Brush, rect.Size))
                 using (var d2dStroke = pen.ToDirect2DStrokeStyle(_deviceContext))
                 {
                     if (wrapper.PlatformBrush != null)
@@ -347,7 +349,7 @@ namespace Avalonia.Direct2D1.Media
             {
                 var impl = (FormattedTextImpl)text;
 
-                using (var brush = CreateBrush(foreground, impl.Bounds))
+                using (var brush = CreateBrush(foreground, impl.Bounds.Size))
                 using (var renderer = new AvaloniaTextRenderer(this, _deviceContext, brush.PlatformBrush))
                 {
                     if (brush.PlatformBrush != null)
@@ -365,7 +367,7 @@ namespace Avalonia.Direct2D1.Media
         /// <param name="glyphRun">The glyph run.</param>
         public void DrawGlyphRun(IBrush foreground, GlyphRun glyphRun)
         {
-            using (var brush = CreateBrush(foreground, new Rect(glyphRun.Size)))
+            using (var brush = CreateBrush(foreground, glyphRun.Size))
             {
                 var glyphRunImpl = (GlyphRunImpl)glyphRun.GlyphRunImpl;
 
@@ -456,9 +458,9 @@ namespace Avalonia.Direct2D1.Media
         /// Creates a Direct2D brush wrapper for a Avalonia brush.
         /// </summary>
         /// <param name="brush">The avalonia brush.</param>
-        /// <param name="destinationRect">The brush's target area.</param>
+        /// <param name="destinationSize">The size of the brush's target area.</param>
         /// <returns>The Direct2D brush wrapper.</returns>
-        public BrushImpl CreateBrush(IBrush brush, Rect destinationRect)
+        public BrushImpl CreateBrush(IBrush brush, Size destinationSize)
         {
             var solidColorBrush = brush as ISolidColorBrush;
             var linearGradientBrush = brush as ILinearGradientBrush;
@@ -473,11 +475,11 @@ namespace Avalonia.Direct2D1.Media
             }
             else if (linearGradientBrush != null)
             {
-                return new LinearGradientBrushImpl(linearGradientBrush, _deviceContext, destinationRect);
+                return new LinearGradientBrushImpl(linearGradientBrush, _deviceContext, destinationSize);
             }
             else if (radialGradientBrush != null)
             {
-                return new RadialGradientBrushImpl(radialGradientBrush, _deviceContext, destinationRect);
+                return new RadialGradientBrushImpl(radialGradientBrush, _deviceContext, destinationSize);
             }
             else if (conicGradientBrush != null)
             {
@@ -490,7 +492,7 @@ namespace Avalonia.Direct2D1.Media
                     imageBrush,
                     _deviceContext,
                     (BitmapImpl)imageBrush.Source.PlatformImpl.Item,
-                    destinationRect.Size);
+                    destinationSize);
             }
             else if (visualBrush != null)
             {
@@ -521,7 +523,7 @@ namespace Avalonia.Direct2D1.Media
                                 visualBrush,
                                 _deviceContext,
                                 new D2DBitmapImpl(intermediate.Bitmap),
-                                destinationRect.Size);
+                                destinationSize);
                         }
                     }
                 }
@@ -573,7 +575,7 @@ namespace Avalonia.Direct2D1.Media
                 ContentBounds = PrimitiveExtensions.RectangleInfinite,
                 MaskTransform = PrimitiveExtensions.Matrix3x2Identity,
                 Opacity = 1,
-                OpacityBrush = CreateBrush(mask, bounds).PlatformBrush
+                OpacityBrush = CreateBrush(mask, bounds.Size).PlatformBrush
             };
             var layer = _layerPool.Count != 0 ? _layerPool.Pop() : new Layer(_deviceContext);
             _deviceContext.PushLayer(ref parameters, layer);
diff --git a/src/Windows/Avalonia.Direct2D1/Media/GeometryGroupImpl.cs b/src/Windows/Avalonia.Direct2D1/Media/GeometryGroupImpl.cs
new file mode 100644
index 0000000000..352708bf03
--- /dev/null
+++ b/src/Windows/Avalonia.Direct2D1/Media/GeometryGroupImpl.cs
@@ -0,0 +1,33 @@
+using System.Collections.Generic;
+using SharpDX.Direct2D1;
+using AM = Avalonia.Media;
+
+namespace Avalonia.Direct2D1.Media
+{
+    /// <summary>
+    /// A Direct2D implementation of a <see cref="Avalonia.Media.GeometryGroup"/>.
+    /// </summary>
+    internal class GeometryGroupImpl : GeometryImpl
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StreamGeometryImpl"/> class.
+        /// </summary>
+        public GeometryGroupImpl(AM.FillRule fillRule, IReadOnlyList<AM.Geometry> geometry)
+            : base(CreateGeometry(fillRule, geometry))
+        {
+        }
+
+        private static Geometry CreateGeometry(AM.FillRule fillRule, IReadOnlyList<AM.Geometry> children)
+        {
+            var count = children.Count;
+            var c = new Geometry[count];
+
+            for (var i = 0; i < count; ++i)
+            {
+                c[i] = ((GeometryImpl)children[i].PlatformImpl).Geometry;
+            }
+
+            return new GeometryGroup(Direct2D1Platform.Direct2D1Factory, (FillMode)fillRule, c);
+        }
+    }
+}
diff --git a/src/Windows/Avalonia.Direct2D1/Media/LinearGradientBrushImpl.cs b/src/Windows/Avalonia.Direct2D1/Media/LinearGradientBrushImpl.cs
index 69b45455ac..0e63d4cc03 100644
--- a/src/Windows/Avalonia.Direct2D1/Media/LinearGradientBrushImpl.cs
+++ b/src/Windows/Avalonia.Direct2D1/Media/LinearGradientBrushImpl.cs
@@ -8,7 +8,7 @@ namespace Avalonia.Direct2D1.Media
         public LinearGradientBrushImpl(
             ILinearGradientBrush brush,
             SharpDX.Direct2D1.RenderTarget target,
-            Rect destinationRect)
+            Size destinationSize)
         {
             if (brush.GradientStops.Count == 0)
             {
@@ -21,9 +21,8 @@ namespace Avalonia.Direct2D1.Media
                 Position = (float)s.Offset
             }).ToArray();
 
-            var position = destinationRect.Position;
-            var startPoint = position + brush.StartPoint.ToPixels(destinationRect.Size);
-            var endPoint = position + brush.EndPoint.ToPixels(destinationRect.Size);
+            var startPoint = brush.StartPoint.ToPixels(destinationSize);
+            var endPoint = brush.EndPoint.ToPixels(destinationSize);
 
             using (var stops = new SharpDX.Direct2D1.GradientStopCollection(
                 target,
diff --git a/src/Windows/Avalonia.Direct2D1/Media/RadialGradientBrushImpl.cs b/src/Windows/Avalonia.Direct2D1/Media/RadialGradientBrushImpl.cs
index 7dcfd7e1e0..1fca6d4e33 100644
--- a/src/Windows/Avalonia.Direct2D1/Media/RadialGradientBrushImpl.cs
+++ b/src/Windows/Avalonia.Direct2D1/Media/RadialGradientBrushImpl.cs
@@ -8,7 +8,7 @@ namespace Avalonia.Direct2D1.Media
         public RadialGradientBrushImpl(
             IRadialGradientBrush brush,
             SharpDX.Direct2D1.RenderTarget target,
-            Rect destinationRect)
+            Size destinationSize)
         {
             if (brush.GradientStops.Count == 0)
             {
@@ -21,13 +21,12 @@ namespace Avalonia.Direct2D1.Media
                 Position = (float)s.Offset
             }).ToArray();
 
-            var position = destinationRect.Position;
-            var centerPoint = position + brush.Center.ToPixels(destinationRect.Size);
-            var gradientOrigin = position + brush.GradientOrigin.ToPixels(destinationRect.Size) - centerPoint;
+            var centerPoint = brush.Center.ToPixels(destinationSize);
+            var gradientOrigin = brush.GradientOrigin.ToPixels(destinationSize) - centerPoint;
             
             // Note: Direct2D supports RadiusX and RadiusY but Cairo backend supports only Radius property
-            var radiusX = brush.Radius * destinationRect.Width;
-            var radiusY = brush.Radius * destinationRect.Height;
+            var radiusX = brush.Radius * destinationSize.Width;
+            var radiusY = brush.Radius * destinationSize.Height;
 
             using (var stops = new SharpDX.Direct2D1.GradientStopCollection(
                 target,
diff --git a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
index ad409810b8..6a6bcc5715 100644
--- a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
+++ b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
@@ -808,6 +808,31 @@ namespace Avalonia.Win32.Interop
             MNC_SELECT = 3
         }
 
+        public enum SysCommands
+        {
+            SC_SIZE = 0xF000,
+            SC_MOVE = 0xF010,
+            SC_MINIMIZE = 0xF020,
+            SC_MAXIMIZE = 0xF030,
+            SC_NEXTWINDOW = 0xF040,
+            SC_PREVWINDOW = 0xF050,
+            SC_CLOSE = 0xF060,
+            SC_VSCROLL = 0xF070,
+            SC_HSCROLL = 0xF080,
+            SC_MOUSEMENU = 0xF090,
+            SC_KEYMENU = 0xF100,
+            SC_ARRANGE = 0xF110,
+            SC_RESTORE = 0xF120,
+            SC_TASKLIST = 0xF130,
+            SC_SCREENSAVE = 0xF140,
+            SC_HOTKEY = 0xF150,
+            SC_DEFAULT = 0xF160,
+            SC_MONITORPOWER = 0xF170,
+            SC_CONTEXTHELP = 0xF180,
+            SC_SEPARATOR = 0xF00F,
+            SCF_ISSECURE = 0x00000001,
+        }
+
         [StructLayout(LayoutKind.Sequential)]
         public struct RGBQUAD
         {
diff --git a/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs b/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs
index d163b3d068..f7ed2f215f 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs
@@ -123,6 +123,12 @@ namespace Avalonia.Win32
                         break;
                     }
 
+                case WindowsMessage.WM_SYSCOMMAND:
+                    // Disable system handling of Alt/F10 menu keys.
+                    if ((SysCommands)wParam == SysCommands.SC_KEYMENU && HighWord(ToInt32(lParam)) <= 0)
+                        return IntPtr.Zero;
+                    break;
+
                 case WindowsMessage.WM_MENUCHAR:
                     {
                         // mute the system beep
diff --git a/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj b/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj
index 32f90d5cbf..c4c1f49346 100644
--- a/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj
+++ b/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj
@@ -14,6 +14,7 @@
   <Import Project="..\..\build\SharedVersion.props" />
   <ItemGroup>
     <ProjectReference Include="..\..\src\Avalonia.Base\Avalonia.Base.csproj" />
+    <ProjectReference Include="..\..\src\Markup\Avalonia.Markup.Xaml.Loader\Avalonia.Markup.Xaml.Loader.csproj" />
     <ProjectReference Include="..\Avalonia.UnitTests\Avalonia.UnitTests.csproj" />
   </ItemGroup>
   <ItemGroup>
diff --git a/tests/Avalonia.Base.UnitTests/Logging/LoggingTests.cs b/tests/Avalonia.Base.UnitTests/Logging/LoggingTests.cs
new file mode 100644
index 0000000000..d160713023
--- /dev/null
+++ b/tests/Avalonia.Base.UnitTests/Logging/LoggingTests.cs
@@ -0,0 +1,73 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Shapes;
+using Avalonia.Markup.Xaml;
+using Avalonia.UnitTests;
+using Xunit;
+
+namespace Avalonia.Base.UnitTests.Logging
+{
+    public class LoggingTests
+    {
+        [Fact]
+        public void Control_Should_Not_Log_Binding_Errors_When_Detached_From_Visual_Tree()
+        {
+            using (UnitTestApplication.Start(TestServices.StyledWindow))
+            {
+                var xaml = @"
+<Window xmlns='https://github.com/avaloniaui'
+        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
+        xmlns:local='clr-namespace:Avalonia.Base.UnitTests.Logging;assembly=Avalonia.UnitTests'>
+    <Panel Name='panel'>
+    <Rectangle Name='rect' Fill='{Binding $parent[Window].Background}'/>
+  </Panel>
+</Window>";
+
+                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+                var calledTimes = 0;
+                using var logSink = TestLogSink.Start((l, a, s, m, d) =>
+                {
+                    if (l >= Avalonia.Logging.LogEventLevel.Warning)
+                    {
+                        calledTimes++;
+                    }
+                });
+                var panel = window.FindControl<Panel>("panel");
+                var rect = window.FindControl<Rectangle>("rect");
+                window.ApplyTemplate();
+                window.Presenter.ApplyTemplate();
+                panel.Children.Remove(rect);
+                Assert.Equal(0, calledTimes);
+            }
+        }
+
+        [Fact]
+        public void Control_Should_Log_Binding_Errors_When_No_Ancestor_With_Such_Name()
+        {
+            using (UnitTestApplication.Start(TestServices.StyledWindow))
+            {
+                var xaml = @"
+<Window xmlns='https://github.com/avaloniaui'
+        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
+        xmlns:local='clr-namespace:Avalonia.Base.UnitTests.Logging;assembly=Avalonia.UnitTests'>
+    <Panel>
+    <Rectangle Fill='{Binding $parent[Grid].Background}'/>
+  </Panel>
+</Window>";
+                var calledTimes = 0;
+                using var logSink = TestLogSink.Start((l, a, s, m, d) =>
+                {
+                    if (l >= Avalonia.Logging.LogEventLevel.Warning && s is Rectangle)
+                    {
+                        calledTimes++;
+                    }
+                });
+                var window = (Window)AvaloniaRuntimeXamlLoader.Load(xaml);
+                window.ApplyTemplate();
+                window.Presenter.ApplyTemplate();
+                Assert.Equal(1, calledTimes);
+            }
+        }
+    }
+
+
+}
diff --git a/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs b/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs
index 876a0de643..3e11c74e1c 100644
--- a/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs
+++ b/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs
@@ -36,6 +36,16 @@ namespace Avalonia.Benchmarks
             return new MockStreamGeometryImpl();
         }
 
+        public IGeometryImpl CreateGeometryGroup(FillRule fillRule, IReadOnlyList<Geometry> children)
+        {
+            throw new NotImplementedException();
+        }
+
+        public IGeometryImpl CreateCombinedGeometry(GeometryCombineMode combineMode, Geometry g1, Geometry g2)
+        {
+            throw new NotImplementedException();
+        }
+
         public IRenderTarget CreateRenderTarget(IEnumerable<object> surfaces)
         {
             throw new NotImplementedException();
diff --git a/tests/Avalonia.RenderTests/Media/CombinedGeometryTests.cs b/tests/Avalonia.RenderTests/Media/CombinedGeometryTests.cs
new file mode 100644
index 0000000000..9c5c0248cf
--- /dev/null
+++ b/tests/Avalonia.RenderTests/Media/CombinedGeometryTests.cs
@@ -0,0 +1,89 @@
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Controls.Shapes;
+using Avalonia.Media;
+using Xunit;
+
+#if AVALONIA_SKIA
+namespace Avalonia.Skia.RenderTests
+#else
+namespace Avalonia.Direct2D1.RenderTests.Media
+#endif
+{
+    public class CombinedGeometryTests : TestBase
+    {
+        public CombinedGeometryTests()
+            : base(@"Media\CombinedGeometry")
+        {
+        }
+
+        [Theory]
+        [InlineData(Avalonia.Media.GeometryCombineMode.Union)]
+        [InlineData(Avalonia.Media.GeometryCombineMode.Intersect)]
+        [InlineData(Avalonia.Media.GeometryCombineMode.Xor)]
+        [InlineData(Avalonia.Media.GeometryCombineMode.Exclude)]
+        public async Task GeometryCombineMode(GeometryCombineMode mode)
+        {
+            var target = new Border
+            {
+                Width = 200,
+                Height = 200,
+                Background = Brushes.White,
+                Child = new Path
+                {
+                    Data = new CombinedGeometry
+                    {
+                        GeometryCombineMode = mode,
+                        Geometry1 = new RectangleGeometry(new Rect(25, 25, 100, 100)),
+                        Geometry2 = new EllipseGeometry
+                        {
+                            Center = new Point(125, 125),
+                            RadiusX = 50,
+                            RadiusY = 50,
+                        }
+                    },
+                    Fill = Brushes.Blue,
+                    Stroke = Brushes.Red,
+                    StrokeThickness = 1,
+                }
+            };
+
+            var testName = $"{nameof(GeometryCombineMode)}_{mode}";
+            await RenderToFile(target, testName);
+            CompareImages(testName);
+        }
+
+        [Fact]
+        public async Task Geometry1_Transform()
+        {
+            var target = new Border
+            {
+                Width = 200,
+                Height = 200,
+                Background = Brushes.White,
+                Child = new Path
+                {
+                    Data = new CombinedGeometry
+                    {
+                        Geometry1 = new RectangleGeometry(new Rect(25, 25, 100, 100))
+                        {
+                            Transform = new RotateTransform(45, 75, 75)
+                        },
+                        Geometry2 = new EllipseGeometry
+                        {
+                            Center = new Point(125, 125),
+                            RadiusX = 50,
+                            RadiusY = 50,
+                        }
+                    },
+                    Fill = Brushes.Blue,
+                    Stroke = Brushes.Red,
+                    StrokeThickness = 1,
+                }
+            };
+
+            await RenderToFile(target);
+            CompareImages();
+        }
+    }
+}
diff --git a/tests/Avalonia.RenderTests/Media/ConicGradientBrushTests.cs b/tests/Avalonia.RenderTests/Media/ConicGradientBrushTests.cs
index 3d2f09e2a8..ef400410a4 100644
--- a/tests/Avalonia.RenderTests/Media/ConicGradientBrushTests.cs
+++ b/tests/Avalonia.RenderTests/Media/ConicGradientBrushTests.cs
@@ -200,7 +200,8 @@ namespace Avalonia.Direct2D1.RenderTests.Media
                 Child = new DrawnControl(c =>
                 {
                     c.DrawRectangle(brush, null, new Rect(0, 0, 100, 100));
-                    c.DrawRectangle(brush, null, new Rect(100, 100, 100, 100));
+                    using (c.PushPreTransform(Matrix.CreateTranslation(100, 100)))
+                        c.DrawRectangle(brush, null, new Rect(0, 0, 100, 100));
                 }),
             };
 
diff --git a/tests/Avalonia.RenderTests/Media/GeometryGroupTests.cs b/tests/Avalonia.RenderTests/Media/GeometryGroupTests.cs
new file mode 100644
index 0000000000..9ebbd30e05
--- /dev/null
+++ b/tests/Avalonia.RenderTests/Media/GeometryGroupTests.cs
@@ -0,0 +1,95 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Controls.Shapes;
+using Avalonia.Media;
+using Avalonia.Media.Imaging;
+using Xunit;
+
+#if AVALONIA_SKIA
+namespace Avalonia.Skia.RenderTests
+#else
+namespace Avalonia.Direct2D1.RenderTests.Media
+#endif
+{
+    public class GeometryGroupTests : TestBase
+    {
+        public GeometryGroupTests()
+            : base(@"Media\GeometryGroup")
+        {
+        }
+
+        [Theory]
+        [InlineData(FillRule.EvenOdd)]
+        [InlineData(FillRule.NonZero)]
+        public async Task FillRule_Stroke(FillRule fillRule)
+        {
+            var target = new Border
+            {
+                Width = 200,
+                Height = 200,
+                Background = Brushes.White,
+                Child = new Path
+                {
+                    Data = new GeometryGroup
+                    {
+                        FillRule = fillRule,
+                        Children =
+                        {
+                            new RectangleGeometry(new Rect(25, 25, 100, 100)),
+                            new EllipseGeometry
+                            {
+                                Center = new Point(125, 125),
+                                RadiusX = 50,
+                                RadiusY = 50,
+                            },
+                        }
+                    },
+                    Fill = Brushes.Blue,
+                    Stroke = Brushes.Red,
+                    StrokeThickness = 1,
+                }
+            };
+
+            var testName = $"{nameof(FillRule_Stroke)}_{fillRule}";
+            await RenderToFile(target, testName);
+            CompareImages(testName);
+        }
+
+        [Fact]
+        public async Task Child_Transform()
+        {
+            var target = new Border
+            {
+                Width = 200,
+                Height = 200,
+                Background = Brushes.White,
+                Child = new Path
+                {
+                    Data = new GeometryGroup
+                    {
+                        Children =
+                        {
+                            new RectangleGeometry(new Rect(25, 25, 100, 100))
+                            {
+                                Transform = new RotateTransform(45, 75, 75)
+                            },
+                            new EllipseGeometry
+                            {
+                                Center = new Point(125, 125),
+                                RadiusX = 50,
+                                RadiusY = 50,
+                            },
+                        }
+                    },
+                    Fill = Brushes.Blue,
+                    Stroke = Brushes.Red,
+                    StrokeThickness = 1,
+                }
+            };
+
+            await RenderToFile(target);
+            CompareImages();
+        }
+    }
+}
diff --git a/tests/Avalonia.RenderTests/Media/LinearGradientBrushTests.cs b/tests/Avalonia.RenderTests/Media/LinearGradientBrushTests.cs
index 28701f2f97..dd9d2f9b39 100644
--- a/tests/Avalonia.RenderTests/Media/LinearGradientBrushTests.cs
+++ b/tests/Avalonia.RenderTests/Media/LinearGradientBrushTests.cs
@@ -81,10 +81,10 @@ namespace Avalonia.Direct2D1.RenderTests.Media
                 StartPoint = new RelativePoint(0, 0, RelativeUnit.Relative),
                 EndPoint = new RelativePoint(1, 1, RelativeUnit.Relative),
                 GradientStops =
-                        {
-                            new GradientStop { Color = Colors.Red, Offset = 0 },
-                            new GradientStop { Color = Colors.Blue, Offset = 1 }
-                        }
+                {
+                    new GradientStop { Color = Colors.Red, Offset = 0 },
+                    new GradientStop { Color = Colors.Blue, Offset = 1 }
+                }
             };
 
             Decorator target = new Decorator
@@ -94,7 +94,9 @@ namespace Avalonia.Direct2D1.RenderTests.Media
                 Child = new DrawnControl(c =>
                 {
                     c.DrawRectangle(brush, null, new Rect(0, 0, 100, 100));
-                    c.DrawRectangle(brush, null, new Rect(100, 100, 100, 100));
+
+                    using (c.PushPreTransform(Matrix.CreateTranslation(100, 100)))
+                        c.DrawRectangle(brush, null, new Rect(0, 0, 100, 100));
                 }),
             };
 
diff --git a/tests/Avalonia.RenderTests/Media/RadialGradientBrushTests.cs b/tests/Avalonia.RenderTests/Media/RadialGradientBrushTests.cs
index 95fae7f2fa..e52f844359 100644
--- a/tests/Avalonia.RenderTests/Media/RadialGradientBrushTests.cs
+++ b/tests/Avalonia.RenderTests/Media/RadialGradientBrushTests.cs
@@ -185,7 +185,8 @@ namespace Avalonia.Direct2D1.RenderTests.Media
                 Child = new DrawnControl(c =>
                 {
                     c.DrawRectangle(brush, null, new Rect(0, 0, 100, 100));
-                    c.DrawRectangle(brush, null, new Rect(100, 100, 100, 100));
+                    using (c.PushPreTransform(Matrix.CreateTranslation(100, 100)))
+                        c.DrawRectangle(brush, null, new Rect(0, 0, 100, 100));
                 }),
             };
 
diff --git a/tests/Avalonia.UnitTests/MockPlatformRenderInterface.cs b/tests/Avalonia.UnitTests/MockPlatformRenderInterface.cs
index 74366f9e26..1f632034be 100644
--- a/tests/Avalonia.UnitTests/MockPlatformRenderInterface.cs
+++ b/tests/Avalonia.UnitTests/MockPlatformRenderInterface.cs
@@ -52,6 +52,16 @@ namespace Avalonia.UnitTests
             return new MockStreamGeometryImpl();
         }
 
+        public IGeometryImpl CreateGeometryGroup(FillRule fillRule, IReadOnlyList<Geometry> children)
+        {
+            return Mock.Of<IGeometryImpl>();
+        }
+
+        public IGeometryImpl CreateCombinedGeometry(GeometryCombineMode combineMode, Geometry g1, Geometry g2)
+        {
+            return Mock.Of<IGeometryImpl>();
+        }
+
         public IWriteableBitmapImpl CreateWriteableBitmap(
             PixelSize size,
             Vector dpi,
diff --git a/tests/Avalonia.Visuals.UnitTests/Media/GeometryGroupTests.cs b/tests/Avalonia.Visuals.UnitTests/Media/GeometryGroupTests.cs
new file mode 100644
index 0000000000..8f80238903
--- /dev/null
+++ b/tests/Avalonia.Visuals.UnitTests/Media/GeometryGroupTests.cs
@@ -0,0 +1,26 @@
+using Avalonia.Media;
+using Xunit;
+
+namespace Avalonia.Visuals.UnitTests.Media
+{
+    public class GeometryGroupTests
+    {
+        [Fact]
+        public void Children_Should_Have_Initial_Collection()
+        {
+            var target = new GeometryGroup();
+
+            Assert.NotNull(target.Children);
+        }
+
+        [Fact]
+        public void Children_Can_Be_Set_To_Null()
+        {
+            var target = new GeometryGroup();
+
+            target.Children = null;
+
+            Assert.Null(target.Children);
+        }
+    }
+}
diff --git a/tests/Avalonia.Visuals.UnitTests/Media/PathMarkupParserTests.cs b/tests/Avalonia.Visuals.UnitTests/Media/PathMarkupParserTests.cs
index c5ad705654..ba8c490829 100644
--- a/tests/Avalonia.Visuals.UnitTests/Media/PathMarkupParserTests.cs
+++ b/tests/Avalonia.Visuals.UnitTests/Media/PathMarkupParserTests.cs
@@ -297,5 +297,28 @@ namespace Avalonia.Visuals.UnitTests.Media
                 Assert.Equal(new Point(20, 20), figure.StartPoint);
             }
         }
+
+        [Fact]
+        public void Should_Parse_Flags_Without_Separator()
+        {
+            var pathGeometry = new PathGeometry();
+            using (var context = new PathGeometryContext(pathGeometry))
+            using (var parser = new PathMarkupParser(context))
+            {
+                parser.Parse("a.898.898 0 01.27.188");
+
+                var figure = pathGeometry.Figures[0];
+
+                var segments = figure.Segments;
+                
+                Assert.NotNull(segments);
+                
+                Assert.Equal(1, segments.Count);
+
+                var arcSegment = segments[0];
+
+                Assert.IsType<ArcSegment>(arcSegment);
+            }
+        }
     }
 }
diff --git a/tests/Avalonia.Visuals.UnitTests/VisualTree/MockRenderInterface.cs b/tests/Avalonia.Visuals.UnitTests/VisualTree/MockRenderInterface.cs
index 51ea1e893f..229bb8aef3 100644
--- a/tests/Avalonia.Visuals.UnitTests/VisualTree/MockRenderInterface.cs
+++ b/tests/Avalonia.Visuals.UnitTests/VisualTree/MockRenderInterface.cs
@@ -37,6 +37,16 @@ namespace Avalonia.Visuals.UnitTests.VisualTree
             return new MockStreamGeometry();
         }
 
+        public IGeometryImpl CreateGeometryGroup(FillRule fillRule, IReadOnlyList<Geometry> children)
+        {
+            throw new NotImplementedException();
+        }
+
+        public IGeometryImpl CreateCombinedGeometry(GeometryCombineMode combineMode, Geometry g1, Geometry g2)
+        {
+            throw new NotImplementedException();
+        }
+
         public IBitmapImpl LoadBitmap(Stream stream)
         {
             throw new NotImplementedException();
diff --git a/tests/TestFiles/Direct2D1/Media/CombinedGeometry/Geometry1_Transform.expected.png b/tests/TestFiles/Direct2D1/Media/CombinedGeometry/Geometry1_Transform.expected.png
new file mode 100644
index 0000000000..34976f3de6
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diff --git a/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Exclude.expected.png b/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Exclude.expected.png
new file mode 100644
index 0000000000..2c4aa99eeb
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diff --git a/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Intersect.expected.png b/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Intersect.expected.png
new file mode 100644
index 0000000000..abb3cea270
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diff --git a/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Union.expected.png b/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Union.expected.png
new file mode 100644
index 0000000000..f431ef4403
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diff --git a/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Xor.expected.png b/tests/TestFiles/Direct2D1/Media/CombinedGeometry/GeometryCombineMode_Xor.expected.png
new file mode 100644
index 0000000000..4dd547c4bf
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diff --git a/tests/TestFiles/Direct2D1/Media/GeometryGroup/Child_Transform.expected.png b/tests/TestFiles/Direct2D1/Media/GeometryGroup/Child_Transform.expected.png
new file mode 100644
index 0000000000..d8e4c54924
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diff --git a/tests/TestFiles/Direct2D1/Media/GeometryGroup/FillRule_Stroke_EvenOdd.expected.png b/tests/TestFiles/Direct2D1/Media/GeometryGroup/FillRule_Stroke_EvenOdd.expected.png
new file mode 100644
index 0000000000..4dd547c4bf
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diff --git a/tests/TestFiles/Direct2D1/Media/GeometryGroup/FillRule_Stroke_NonZero.expected.png b/tests/TestFiles/Direct2D1/Media/GeometryGroup/FillRule_Stroke_NonZero.expected.png
new file mode 100644
index 0000000000..3ab700dc04
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diff --git a/tests/TestFiles/Skia/Media/CombinedGeometry/Geometry1_Transform.expected.png b/tests/TestFiles/Skia/Media/CombinedGeometry/Geometry1_Transform.expected.png
new file mode 100644
index 0000000000..2b98a79049
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diff --git a/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Exclude.expected.png b/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Exclude.expected.png
new file mode 100644
index 0000000000..2c4aa99eeb
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diff --git a/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Intersect.expected.png b/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Intersect.expected.png
new file mode 100644
index 0000000000..abb3cea270
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diff --git a/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Union.expected.png b/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Union.expected.png
new file mode 100644
index 0000000000..f431ef4403
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diff --git a/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Xor.expected.png b/tests/TestFiles/Skia/Media/CombinedGeometry/GeometryCombineMode_Xor.expected.png
new file mode 100644
index 0000000000..4dd547c4bf
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diff --git a/tests/TestFiles/Skia/Media/GeometryGroup/Child_Transform.expected.png b/tests/TestFiles/Skia/Media/GeometryGroup/Child_Transform.expected.png
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index 0000000000..7182602fce
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diff --git a/tests/TestFiles/Skia/Media/GeometryGroup/FillRule_Stroke_EvenOdd.expected.png b/tests/TestFiles/Skia/Media/GeometryGroup/FillRule_Stroke_EvenOdd.expected.png
new file mode 100644
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diff --git a/tests/TestFiles/Skia/Media/GeometryGroup/FillRule_Stroke_NonZero.expected.png b/tests/TestFiles/Skia/Media/GeometryGroup/FillRule_Stroke_NonZero.expected.png
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