fix(hr): Use type mapping for x:Bind inner bindings class

src/SourceGenerators/Uno.UI.SourceGenerators/XamlGenerator/XamlFileGenerator.cs

@@ -983,7 +983,11 @@ private void BuildCompiledBindingsInitializer(IndentedStringBuilder writer, INam
 
 			if (hasXBindExpressions || hasResourceExtensions)
 			{
-				writer.AppendLineIndented($"Bindings = new {GetBindingsTypeNames(_xClassName.ClassName).bindingsClassName}(this);");
+				var activator = _isHotReloadEnabled
+					? $"(({GetBindingsTypeNames(_xClassName.ClassName).bindingsInterfaceName})global::Uno.UI.Helpers.TypeMappings.CreateInstance<{GetBindingsTypeNames(_xClassName.ClassName).bindingsClassName}>(this))"
+					: $"new {GetBindingsTypeNames(_xClassName.ClassName).bindingsClassName}(this)";
+
+				writer.AppendLineIndented($"Bindings = {activator};");
 			}
 
 			if (isFrameworkElement && (hasXBindExpressions || hasResourceExtensions))

src/Uno.UI/Helpers/TypeMappings.cs

@@ -59,6 +59,15 @@ public static Type GetReplacementType(this Type instanceType)
 		public static object CreateInstance<TOriginalType>()
 			=> Activator.CreateInstance(typeof(TOriginalType).GetReplacementType());
 
+		/// <summary>
+		/// Creates an instance of the replacement type using its original type.
+		/// </summary>
+		/// <typeparam name="TOriginalType">The original type to be created</typeparam>
+		/// <param name="args">The arguments used to create the instance, passed to the ctor</param>
+		/// <returns>An new instance for the original type</returns>
+		public static object CreateInstance<TOriginalType>(params object[] args)
+			=> Activator.CreateInstance(typeof(TOriginalType).GetReplacementType(), args: args);
+
 		internal static Type GetMappedType(this Type originalType) =>
 			OriginalTypeToMappedType.TryGetValue(originalType, out var mappedType) ? mappedType : default;