feat(xamlreader): Support StaticResource assignation to non-DP

src/Uno.UI.Tests/Windows_UI_Xaml_Markup/XamlReaderTests/Given_XamlReader.cs

@@ -810,6 +810,28 @@ public void When_Resources_And_Empty()
 			Assert.IsNotNull(r.Resources);
 		}
 
+		[TestMethod]
+		public void When_StaticResource_And_NonDependencyProperty()
+		{
+			var app = UnitTestsApp.App.EnsureApplication();
+			app.Resources["MyIntResource"] = 77;
+			try
+			{
+				var s = GetContent(nameof(When_StaticResource_And_NonDependencyProperty));
+				var r = Windows.UI.Xaml.Markup.XamlReader.Load(s) as Page;
+
+				var root = r.FindName("root") as Grid;
+				var inner = root.Children.First() as NonDependencyPropertyAssignable;
+
+				Assert.AreEqual(77, inner.MyProperty);
+			}
+			finally
+			{
+				app.Resources.Remove("MyDoubleResource");
+			}
+
+		}
+
 		private string GetContent(string testName)
 		{
 			var assembly = this.GetType().Assembly;

src/Uno.UI.Tests/Windows_UI_Xaml_Markup/XamlReaderTests/When_StaticResource_And_NonDependencyProperty.xamltest

@@ -0,0 +1,11 @@
+<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+      xmlns:controls="Uno.UI.Tests.Windows_UI_Xaml_Markup.XamlReaderTests"
+      mc:Ignorable="d">
+
+  <Grid x:Name="root">
+    <controls:NonDependencyPropertyAssignable MyProperty="{StaticResource MyIntResource}" />
+  </Grid>
+</Page>

src/Uno.UI/UI/Xaml/Markup/Reader/XamlObjectBuilder.cs

@@ -251,7 +251,7 @@ private void ProcessNamedMember(XamlObjectDefinition control, object instance, X
 					{
 						if (IsMarkupExtension(member))
 						{
-							ProcessMemberMarkupExtension(instance, member);
+							ProcessMemberMarkupExtension(instance, member, propertyInfo);
 						}
 						else
 						{
@@ -278,7 +278,7 @@ private void ProcessNamedMember(XamlObjectDefinition control, object instance, X
 					{
 						if (IsMarkupExtension(member))
 						{
-							ProcessMemberMarkupExtension(instance, member);
+							ProcessMemberMarkupExtension(instance, member, null);
 						}
 						else if (instance is DependencyObject dependencyObject)
 						{
@@ -350,7 +350,7 @@ private void ProcessTextBlock(XamlObjectDefinition control, TextBlock instance,
 			{
 				if (IsMarkupExtension(member))
 				{
-					ProcessMemberMarkupExtension(instance, member);
+					ProcessMemberMarkupExtension(instance, member, null);
 				}
 				else
 				{
@@ -451,19 +451,19 @@ private void ProcessMemberElements(object instance, XamlMemberDefinition member,
 		private static MethodInfo GetPropertySetter(PropertyInfo propertyInfo)
 			=> propertyInfo?.SetMethod ?? throw new InvalidOperationException($"Unable to find setter for property [{propertyInfo}]");
 
-		private void ProcessMemberMarkupExtension(object instance, XamlMemberDefinition member)
+		private void ProcessMemberMarkupExtension(object instance, XamlMemberDefinition member, PropertyInfo propertyInfo)
 		{
 			if (IsBindingMarkupNode(member))
 			{
 				ProcessBindingMarkupNode(instance, member);
 			}
 			else if (IsStaticResourceMarkupNode(member) || IsThemeResourceMarkupNode(member))
 			{
-				ProcessStaticResourceMarkupNode(instance, member);
+				ProcessStaticResourceMarkupNode(instance, member, propertyInfo);
 			}
 		}
 
-		private void ProcessStaticResourceMarkupNode(object instance, XamlMemberDefinition member)
+		private void ProcessStaticResourceMarkupNode(object instance, XamlMemberDefinition member, PropertyInfo propertyInfo)
 		{
 			var resourceNode = member.Objects.FirstOrDefault();
 
@@ -491,10 +491,12 @@ private void ProcessStaticResourceMarkupNode(object instance, XamlMemberDefiniti
 						};
 					}
 				}
-				else
+				else if (propertyInfo != null)
 				{
-					// Here we assigned a {StaticResource} on a standard property (not a DependencyProperty)
-					// We can't resolve it.
+					GetPropertySetter(propertyInfo).Invoke(
+						instance,
+						new[] { ResourceResolver.ResolveResourceStatic(keyName, propertyInfo.PropertyType) }
+					);
 				}
 			}
 		}