OutlineText custom control class derives layout, event, data binding, and rendering from derived FrameworkElement class. Adapted from https://github.com/dotnet/docs/blob/master/samples/snippets/csharp/VS_Snippets_Wpf/OutlineTextControlViewer/CSharp/OutlineTextControl.cs

public class OutlineTextControl : System.Windows.FrameworkElement, System.ComponentModel.ISupportInitialize, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable  

Public Class OutlineTextControl 
   Inherits System.Windows.FrameworkElement
   Implements System.ComponentModel.ISupportInitialize, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable