OnApplyTemplate not called in Custom Control

Question

I have a Custom Control which uses some PART controls:

 [TemplatePart(Name = \"PART_TitleTextBox\", Type = typeof(TextBox))]
    [TemplatePart(Name = \"PART_Titl         


        

Answer 1

I can't see your constructor, but don't forget to set the DefaultStyleKey:

DefaultStyleKeyProperty.OverrideMetadata(typeof(TitleBoxNew), new FrameworkPropertyMetadata(typeof(TitleBoxNew)));