In C#, how do you send a refresh/repaint message to a WPF grid or canvas?

Question

How do you send a refresh message to a WPF grid or canvas?

In other words, I have noticed while in debug mode, I can write code that sends a line to the display and

Answer 1

I'm used to winforms so this is only a guess, but look for an Invalidate() method.

Answer 2

Refresh update WPF Controls like Winforms

public static class ExtensionMethods
{
   private static Action EmptyDelegate = delegate() { };

   public static void Refresh(this UIElement uiElement)
   {
      uiElement.Dispatcher.Invoke(DispatcherPriority.Render, EmptyDelegate);
   }
}