Don't need TemplateBindingExtension.

Can just use TemplateBinding directly.

src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj

@@ -48,7 +48,6 @@
         <Compile Include="Converters\SelectorTypeConverter.cs" />
         <Compile Include="MarkupExtensions\BindingExtension.cs" />
         <Compile Include="MarkupExtensions\RelativeSourceExtension.cs" />
-        <Compile Include="MarkupExtensions\TemplateBindingExtension.cs" />
         <Compile Include="PortableXaml\AvaloniaTypeAttributeProvider.cs" />
         <Compile Include="PortableXaml\AvaloniaXamlType.cs" />
         <Compile Include="PortableXaml\TypeDescriptorExtensions.cs" />

src/Markup/Avalonia.Markup.Xaml/MarkupExtensions/TemplateBindingExtension.cs

@@ -1,55 +0,0 @@
-// 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.Data;
-using Avalonia.Data.Converters;
-using Portable.Xaml.Markup;
-
-namespace Avalonia.Markup.Xaml.MarkupExtensions
-{
-    [MarkupExtensionReturnType(typeof(IBinding))]
-    public class TemplateBindingExtension : MarkupExtension
-    {
-        public TemplateBindingExtension()
-        {
-        }
-
-        public TemplateBindingExtension(AvaloniaProperty property)
-        {
-            Property = property;
-        }
-
-        public override object ProvideValue(IServiceProvider serviceProvider)
-        {
-            return new TemplateBinding
-            {
-                Converter = Converter,
-                ConverterParameter = ConverterParameter,
-                Mode = Mode,
-                Property = Property,
-            };
-        }
-
-        /// <summary>
-        /// Gets or sets the <see cref="IValueConverter"/> to use.
-        /// </summary>
-        public IValueConverter Converter { get; set; }
-
-        /// <summary>
-        /// Gets or sets a parameter to pass to <see cref="Converter"/>.
-        /// </summary>
-        public object ConverterParameter { get; set; }
-
-        /// <summary>
-        /// Gets or sets the binding mode.
-        /// </summary>
-        public BindingMode Mode { get; set; }
-
-        /// <summary>
-        /// Gets or sets the name of the source property on the templated parent.
-        /// </summary>
-        [ConstructorArgument("property")]
-        public AvaloniaProperty Property { get; set; }
-    }
-}

src/Markup/Avalonia.Markup.Xaml/PortableXaml/AvaloniaXamlSchemaContext.cs

@@ -166,7 +166,6 @@ namespace Avalonia.Markup.Xaml.PortableXaml
         {
             { typeof(Binding), typeof(BindingExtension) },
             { typeof(StyleInclude), typeof(StyleIncludeExtension) },
-            { typeof(TemplateBinding), typeof(TemplateBindingExtension) },
         };
 
         private XamlType GetAvaloniaXamlType(Type type)

src/Markup/Avalonia.Markup/Data/TemplateBinding.cs

@@ -17,6 +17,15 @@ namespace Avalonia.Data
         private IStyledElement _target;
         private Type _targetType;
 
+        public TemplateBinding()
+        {
+        }
+
+        public TemplateBinding(AvaloniaProperty property)
+        {
+            Property = property;
+        }
+
         /// <inheritdoc/>
         public InstancedBinding Initiate(
             IAvaloniaObject target,