public void OnControlTemplateChanged() { tlog.Debug(tag, $"OnControlTemplateChanged START"); try { var view = new MyView(); var child = new MyView(); child.Parent = view; TemplateUtilities.OnControlTemplateChanged(view, "old", "new"); } catch (Exception e) { Assert.Fail("Catch exception" + e.Message.ToString()); } tlog.Debug(tag, $"OnControlTemplateChanged END"); }