diff --git a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
index 9e9bd33046..01717af372 100644
--- a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
+++ b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
@@ -53,6 +53,8 @@
     <Compile Include="AvaloniaXamlLoaderPortableXaml.cs" />
     <Compile Include="AvaloniaXamlLoader.cs" />
     <Compile Include="Converters\SetterValueTypeConverter.cs" />
+    <Compile Include="MarkupExtensions\StyleIncludeExtension.cs" />
+    <Compile Include="PortableXaml\AvaloniaXamlContext.cs" />
     <Compile Include="PortableXaml\XamlBinding.cs" />
     <Compile Include="PortableXaml\AttributeExtensions.cs" />
     <Compile Include="PortableXaml\AvaloniaMemberAttributeProvider.cs" />
diff --git a/src/Markup/Avalonia.Markup.Xaml/AvaloniaXamlLoaderPortableXaml.cs b/src/Markup/Avalonia.Markup.Xaml/AvaloniaXamlLoaderPortableXaml.cs
index 84d65e20b3..f23ce9d8b3 100644
--- a/src/Markup/Avalonia.Markup.Xaml/AvaloniaXamlLoaderPortableXaml.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/AvaloniaXamlLoaderPortableXaml.cs
@@ -2,7 +2,6 @@
 // Licensed under the MIT license. See licence.md file in the project root for full license information.
 
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml.Context;
 using Avalonia.Markup.Xaml.Data;
 using Avalonia.Markup.Xaml.PortableXaml;
 using Avalonia.Platform;
@@ -45,21 +44,6 @@ namespace Avalonia.Markup.Xaml
         {
         }
 
-        /// <summary>
-        /// Gets the URI of the XAML file currently being loaded.
-        /// </summary>
-        /// <remarks>
-        /// TODO: Making this internal for now as I'm not sure that this is the correct
-        /// thing to do, but its needed by <see cref="StyleInclude"/> to get the URL of
-        /// the currently loading XAML file, as we can't use the OmniXAML parsing context
-        /// there. Maybe we need a way to inject OmniXAML context into the objects its
-        /// constructing?
-        /// </remarks>
-        [Obsolete]
-        internal static Uri UriContext => s_uriStack.Count > 0 ? s_uriStack.Peek() : null;
-
-        private static Stack<Uri> s_uriStack = new Stack<Uri>();
-
         /// <summary>
         /// Loads the XAML into a Avalonia component.
         /// </summary>
@@ -176,47 +160,34 @@ namespace Avalonia.Markup.Xaml
         /// <returns>The loaded object.</returns>
         public object Load(Stream stream, object rootInstance = null, Uri uri = null)
         {
-            try
+            var readerSettings = new XamlXmlReaderSettings()
             {
-                if (uri != null)
-                {
-                    s_uriStack.Push(uri);
-                }
-
-                var readerSettings = new XamlXmlReaderSettings();
-
-                Type type = rootInstance?.GetType();
-
-                if (type != null)
-                {
-                    readerSettings.LocalAssembly = type.GetTypeInfo().Assembly;
-                }
+                BaseUri = uri,
+                LocalAssembly = rootInstance?.GetType().GetTypeInfo().Assembly
+            };
 
-                var reader = new XamlXmlReader(stream, _context, readerSettings);
+            var reader = new XamlXmlReader(stream, _context, readerSettings);
 
-                object result = LoadFromReader(reader, rootInstance);
+            object result = LoadFromReader(reader, rootInstance, readerSettings);
 
-                var topLevel = result as TopLevel;
+            var topLevel = result as TopLevel;
 
-                if (topLevel != null)
-                {
-                    DelayedBinding.ApplyBindings(topLevel);
-                }
-
-                return result;
-            }
-            finally
+            if (topLevel != null)
             {
-                if (uri != null)
-                {
-                    s_uriStack.Pop();
-                }
+                DelayedBinding.ApplyBindings(topLevel);
             }
+
+            return result;
         }
 
-        internal static object LoadFromReader(XamlReader reader, object instance)
+        internal static object LoadFromReader(XamlReader reader,
+                        object instance,
+                        AvaloniaXamlContext context = null)
         {
-            var writer = AvaloniaXamlObjectWriter.Create(reader.SchemaContext, instance);
+            var writer = AvaloniaXamlObjectWriter.Create(
+                                    reader.SchemaContext,
+                                    instance,
+                                    context);
 
             XamlServices.Transform(reader, writer);
 
diff --git a/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/StyleIncludeExtension.cs b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/StyleIncludeExtension.cs
new file mode 100644
index 0000000000..1355ba0597
--- /dev/null
+++ b/src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/StyleIncludeExtension.cs
@@ -0,0 +1,29 @@
+// Copyright (c) The Avalonia Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using Avalonia.Markup.Xaml.Styling;
+using Avalonia.Styling;
+using Portable.Xaml;
+using Portable.Xaml.ComponentModel;
+using Portable.Xaml.Markup;
+using System;
+
+namespace Avalonia.Markup.Xaml.MarkupExtensions
+{
+    [MarkupExtensionReturnType(typeof(IStyle))]
+    public class StyleIncludeExtension : MarkupExtension
+    {
+        public StyleIncludeExtension()
+        {
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            var tdc = (ITypeDescriptorContext)serviceProvider;
+
+            return new StyleInclude(tdc.GetBaseUri()) { Source = Source };
+        }
+
+        public Uri Source { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlContext.cs b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlContext.cs
new file mode 100644
index 0000000000..7196b841b0
--- /dev/null
+++ b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlContext.cs
@@ -0,0 +1,24 @@
+using Portable.Xaml;
+using System;
+using System.Reflection;
+
+namespace Avalonia.Markup.Xaml.PortableXaml
+{
+    public class AvaloniaXamlContext
+    {
+        internal AvaloniaXamlContext(Uri baseUri, Assembly localAssembly)
+        {
+            LocalAssembly = localAssembly;
+            BaseUri = baseUri;
+        }
+
+        public Assembly LocalAssembly { get; }
+
+        public Uri BaseUri { get; }
+
+        public static implicit operator AvaloniaXamlContext(XamlXmlReaderSettings sett)
+        {
+            return new AvaloniaXamlContext(sett.BaseUri, sett.LocalAssembly);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlObjectWriter.cs b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlObjectWriter.cs
index 53b3a8585a..c011be67cb 100644
--- a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlObjectWriter.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlObjectWriter.cs
@@ -1,5 +1,6 @@
 using Avalonia.Data;
 using Portable.Xaml;
+using Portable.Xaml.ComponentModel;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -7,15 +8,23 @@ namespace Avalonia.Markup.Xaml.PortableXaml
 {
     public class AvaloniaXamlObjectWriter : XamlObjectWriter
     {
-        public static AvaloniaXamlObjectWriter Create(XamlSchemaContext schemaContext, object instance)
+        public static AvaloniaXamlObjectWriter Create(
+            XamlSchemaContext schemaContext,
+            object instance,
+            AvaloniaXamlContext context)
         {
-            var writerSettings = new XamlObjectWriterSettings();
             var nameScope = new AvaloniaNameScope { Instance = instance };
-            writerSettings.ExternalNameScope = nameScope;
-            writerSettings.RegisterNamesOnExternalNamescope = true;
-            writerSettings.RootObjectInstance = instance;
 
-            return new AvaloniaXamlObjectWriter(schemaContext, writerSettings, nameScope);
+            var writerSettings = new XamlObjectWriterSettings()
+            {
+                ExternalNameScope = nameScope,
+                RegisterNamesOnExternalNamescope = true,
+                RootObjectInstance = instance
+            };
+
+            return new AvaloniaXamlObjectWriter(schemaContext,
+                                                writerSettings.WithContext(context),
+                                                nameScope);
         }
 
         private readonly DelayedValuesHelper _delayedValuesHelper = new DelayedValuesHelper();
diff --git a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlSchemaContext.cs b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlSchemaContext.cs
index 85731abf37..1e7d78de72 100644
--- a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlSchemaContext.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlSchemaContext.cs
@@ -1,12 +1,14 @@
 using Avalonia.Data;
 using Avalonia.Markup.Xaml.Context;
+using Avalonia.Markup.Xaml.Data;
+using Avalonia.Markup.Xaml.MarkupExtensions;
+using Avalonia.Markup.Xaml.Styling;
 using Portable.Xaml;
 using Portable.Xaml.ComponentModel;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
-using am = Avalonia.Metadata;
 
 namespace Avalonia.Markup.Xaml.PortableXaml
 {
@@ -19,7 +21,7 @@ namespace Avalonia.Markup.Xaml.PortableXaml
 
         private AvaloniaXamlSchemaContext(IRuntimeTypeProvider typeProvider)
         //better not set the references assemblies
-        //TODO: check this on iOS 
+        //TODO: check this on iOS
         //: base(typeProvider.ReferencedAssemblies)
         {
             Contract.Requires<ArgumentNullException>(typeProvider != null);
@@ -150,16 +152,27 @@ namespace Avalonia.Markup.Xaml.PortableXaml
             return result;
         }
 
+        private static readonly Dictionary<Type, Type> _wellKnownExtensionTypes = new Dictionary<Type, Type>()
+        {
+            { typeof(Binding), typeof(BindingExtension) },
+            { typeof(StyleInclude), typeof(StyleIncludeExtension) },
+        };
+
         private XamlType GetAvaloniaXamlType(Type type)
         {
+            Type extType;
+
+            _wellKnownExtensionTypes.TryGetValue(type, out extType);
+
             if (typeof(IBinding).GetTypeInfo().IsAssignableFrom(type.GetTypeInfo()))
             {
-                return BindingXamlType.Create(type, this);
+                return new BindingXamlType(extType ?? type, this);
             }
 
-            if (typeof(AvaloniaObject).GetTypeInfo().IsAssignableFrom(type.GetTypeInfo()))
+            if (extType != null ||
+                typeof(AvaloniaObject).GetTypeInfo().IsAssignableFrom(type.GetTypeInfo()))
             {
-                return new AvaloniaXamlType(type, this);
+                return new AvaloniaXamlType(extType ?? type, this);
             }
 
             return null;
diff --git a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlType.cs b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlType.cs
index 507631d053..53374711f6 100644
--- a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlType.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlType.cs
@@ -1,7 +1,6 @@
 using Avalonia.Controls;
 using Avalonia.Data;
 using Avalonia.Markup.Xaml.Data;
-using Avalonia.Markup.Xaml.MarkupExtensions;
 using Avalonia.Metadata;
 using Avalonia.Styling;
 using Portable.Xaml;
@@ -48,24 +47,13 @@ namespace Avalonia.Markup.Xaml.PortableXaml
 
     public class BindingXamlType : XamlType
     {
-        public static BindingXamlType Create(Type type, XamlSchemaContext schemaContext)
-        {
-            if (type == typeof(Binding))
-            {
-                //in xaml we need to use the extension
-                type = typeof(BindingExtension);
-            }
-
-            return new BindingXamlType(type, schemaContext);
-        }
-
         private static List<Type> _notAssignable =
                                 new List<Type>
                                 {
                                     typeof (IXmlSerializable)
                                 };
 
-        private BindingXamlType(Type underlyingType, XamlSchemaContext schemaContext) :
+        public BindingXamlType(Type underlyingType, XamlSchemaContext schemaContext) :
             base(underlyingType, schemaContext)
         {
         }
@@ -194,7 +182,7 @@ namespace Avalonia.Markup.Xaml.PortableXaml
             {
                 //can't make it work to assign TypeConverter to Setter.Value
                 //so we need it hard coded
-                //TODO: try to assosiate TypeConverter with Setter.Value 
+                //TODO: try to assosiate TypeConverter with Setter.Value
                 //and remove this lines
                 if (instance is Setter &&
                     Member.Name == nameof(Setter.Value) &&
diff --git a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/TypeDescriptorExtensions.cs b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/TypeDescriptorExtensions.cs
index 71330ddbbd..ebe1264856 100644
--- a/src/Markup/Avalonia.Markup.Xaml/PortableXaml/TypeDescriptorExtensions.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/PortableXaml/TypeDescriptorExtensions.cs
@@ -1,7 +1,9 @@
-using System;
+using Avalonia.Markup.Xaml.PortableXaml;
 using Portable.Xaml.Markup;
-using System.Linq;
+using System;
 using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
 
 namespace Portable.Xaml.ComponentModel
 {
@@ -56,5 +58,41 @@ namespace Portable.Xaml.ComponentModel
 
             return amb.GetAllAmbientValues(sc.GetXamlType(typeof(T))).OfType<T>();
         }
+
+        public static Uri GetBaseUri(this ITypeDescriptorContext ctx)
+        {
+            return ctx.GetWriterSettings()?.Context.BaseUri;
+        }
+
+        public static Assembly GetLocalAssembly(this ITypeDescriptorContext ctx)
+        {
+            return ctx.GetWriterSettings()?.Context.LocalAssembly;
+        }
+
+        public static AvaloniaXamlContext GetAvaloniaXamlContext(this ITypeDescriptorContext ctx)
+        {
+            return ctx.GetWriterSettings()?.Context;
+        }
+
+        public static XamlObjectWriterSettings WithContext(this XamlObjectWriterSettings settings, AvaloniaXamlContext context)
+        {
+            return new AvaloniaXamlObjectWriterSettings(settings, context);
+        }
+
+        private static AvaloniaXamlObjectWriterSettings GetWriterSettings(this ITypeDescriptorContext ctx)
+        {
+            return ctx.GetService<IXamlObjectWriterFactory>().GetParentSettings() as AvaloniaXamlObjectWriterSettings;
+        }
+
+        private class AvaloniaXamlObjectWriterSettings : XamlObjectWriterSettings
+        {
+            public AvaloniaXamlObjectWriterSettings(XamlObjectWriterSettings settings, AvaloniaXamlContext context)
+                : base(settings)
+            {
+                Context = context;
+            }
+
+            public AvaloniaXamlContext Context { get; }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Markup/Avalonia.Markup.Xaml/Styling/StyleInclude.cs b/src/Markup/Avalonia.Markup.Xaml/Styling/StyleInclude.cs
index c6c69973cc..04bf28f1ee 100644
--- a/src/Markup/Avalonia.Markup.Xaml/Styling/StyleInclude.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/Styling/StyleInclude.cs
@@ -1,8 +1,8 @@
 // Copyright (c) The Avalonia Project. All rights reserved.
 // Licensed under the MIT license. See licence.md file in the project root for full license information.
 
-using System;
 using Avalonia.Styling;
+using System;
 
 namespace Avalonia.Markup.Xaml.Styling
 {
@@ -17,6 +17,9 @@ namespace Avalonia.Markup.Xaml.Styling
         /// <summary>
         /// Initializes a new instance of the <see cref="StyleInclude"/> class.
         /// </summary>
+        /// <param name="baseUri"></param>
+#if OMNIXAML
+
         public StyleInclude()
         {
             // StyleInclude will usually be loaded from XAML and its URI can be relative to the
@@ -25,6 +28,15 @@ namespace Avalonia.Markup.Xaml.Styling
             _baseUri = AvaloniaXamlLoader.UriContext;
         }
 
+#else
+
+        public StyleInclude(Uri baseUri)
+        {
+            _baseUri = baseUri;
+        }
+
+#endif
+
         /// <summary>
         /// Gets or sets the source URL.
         /// </summary>
@@ -68,4 +80,4 @@ namespace Avalonia.Markup.Xaml.Styling
             return Loaded.FindResource(name);
         }
     }
-}
+}
\ No newline at end of file