fix: Obsolete

src/Avalonia.Base/Rendering/SceneGraph/VisualNode.cs

@@ -303,7 +303,7 @@ namespace Avalonia.Rendering.SceneGraph
             if (ClipToBounds)
             {
                 context.Transform = Matrix.Identity;
-                if (ClipToBoundsRadius.IsEmpty)
+                if (ClipToBoundsRadius.IsDefault)
                     context.PushClip(ClipBounds);
                 else
                     context.PushClip(new RoundedRect(ClipBounds, ClipToBoundsRadius));

src/Avalonia.Controls.DataGrid/DataGrid.cs

@@ -3299,7 +3299,7 @@ namespace Avalonia.Controls
                 newCell.IsVisible = column.IsVisible;
                 if (row.OwningGrid.CellTheme is {} cellTheme)
                 {
-                    newCell.SetValue(ThemeProperty, cellTheme, BindingPriority.TemplatedParent);
+                    newCell.SetValue(ThemeProperty, cellTheme, BindingPriority.Template);
                 }
             }
             row.Cells.Insert(column.Index, newCell);

src/Avalonia.Controls.DataGrid/DataGridColumn.cs

@@ -897,7 +897,7 @@ namespace Avalonia.Controls
             result[!ContentControl.ContentTemplateProperty] = this[!HeaderTemplateProperty];
             if (OwningGrid.ColumnHeaderTheme is {} columnTheme)
             {
-                result.SetValue(StyledElement.ThemeProperty, columnTheme, BindingPriority.TemplatedParent);
+                result.SetValue(StyledElement.ThemeProperty, columnTheme, BindingPriority.Template);
             }
 
             return result;

src/Avalonia.Controls.DataGrid/DataGridColumnHeader.cs

@@ -673,7 +673,7 @@ namespace Avalonia.Controls
             };
             if (OwningGrid.ColumnHeaderTheme is {} columnHeaderTheme)
             {
-                dragIndicator.SetValue(ThemeProperty, columnHeaderTheme, BindingPriority.TemplatedParent);
+                dragIndicator.SetValue(ThemeProperty, columnHeaderTheme, BindingPriority.Template);
             }
 
             dragIndicator.PseudoClasses.Add(":dragIndicator");

src/Avalonia.Controls.DataGrid/DataGridRow.cs

@@ -253,7 +253,7 @@ namespace Avalonia.Controls
                     };
                     if (OwningGrid.CellTheme is {} cellTheme)
                     {
-                        _fillerCell.SetValue(ThemeProperty, cellTheme, BindingPriority.TemplatedParent);
+                        _fillerCell.SetValue(ThemeProperty, cellTheme, BindingPriority.Template);
                     }
                     if (_cellsElement != null)
                     {

src/Avalonia.Controls.DataGrid/DataGridRows.cs

@@ -1029,7 +1029,7 @@ namespace Avalonia.Controls
                 dataGridRow.DataContext = dataContext;
                 if (RowTheme is {} rowTheme)
                 {
-                    dataGridRow.SetValue(ThemeProperty, rowTheme, BindingPriority.TemplatedParent);
+                    dataGridRow.SetValue(ThemeProperty, rowTheme, BindingPriority.Template);
                 }
                 CompleteCellsCollection(dataGridRow);
 
@@ -2743,7 +2743,7 @@ namespace Avalonia.Controls
             groupHeader.Level = rowGroupInfo.Level;
             if (RowGroupTheme is {} rowGroupTheme)
             {
-                groupHeader.SetValue(ThemeProperty, rowGroupTheme, BindingPriority.TemplatedParent);
+                groupHeader.SetValue(ThemeProperty, rowGroupTheme, BindingPriority.Template);
             }
 
             // Set the RowGroupHeader's PropertyName. Unfortunately, CollectionViewGroup doesn't have this

src/Avalonia.Controls/BorderVisual.cs

@@ -50,7 +50,7 @@ class CompositionBorderVisual : CompositionDrawListVisual
             if (ClipToBounds)
             {
                 var clipRect = Root!.SnapToDevicePixels(new Rect(new Size(Size.X, Size.Y)));
-                if (_cornerRadius.IsEmpty)
+                if (_cornerRadius.IsDefault)
                     canvas.PushClip(clipRect);
                 else
                     canvas.PushClip(new RoundedRect(clipRect, _cornerRadius));
@@ -73,4 +73,4 @@ class CompositionBorderVisual : CompositionDrawListVisual
         protected override bool HandlesClipToBounds => true;
     }
 
-}
+}