fix https://github.com/icsharpcode/ILSpy/issues/2116

ILSpy.BamlDecompiler/Handlers/Records/PropertyWithExtensionHandler.cs

@@ -47,7 +47,12 @@ namespace ILSpy.BamlDecompiler.Handlers
 			if (valTypeExt || extTypeId == (short)KnownTypes.TypeExtension)
 			{
 				var value = ctx.ResolveType(record.ValueId);
-				ext.Initializer = new object[] { ctx.ToString(parent.Xaml, value) };
+
+				object[] initializer = new object[] { ctx.ToString(parent.Xaml, value) };
+				if (valTypeExt)
+					initializer = new object[] { new XamlExtension(ctx.ResolveType(0xfd4d)) { Initializer = initializer } }; // Known type - TypeExtension
+
+				ext.Initializer = initializer;
 			}
 			else if (extTypeId == (short)KnownTypes.TemplateBindingExtension)
 			{
@@ -97,7 +102,12 @@ namespace ILSpy.BamlDecompiler.Handlers
 
 					attrName = ctx.ToString(parent.Xaml, xName);
 				}
-				ext.Initializer = new object[] { attrName };
+
+				object[] initializer = new object[] { attrName };
+				if (valStaticExt)
+					initializer = new object[] { new XamlExtension(ctx.ResolveType(0xfda6)) { Initializer = initializer } }; // Known type - StaticExtension
+
+				ext.Initializer = initializer;
 			}
 			else
 			{