After way to much WPF experimentation and searching the web for answers, I finally broke down and bought the book Pro WPF in C# 2008 and I have to say it was worth every penny. I'm only 200 pages in and it has already clarified and crystallized a great deal that was tremendously fuzzy from the rudimentary coverage in Pro C# 2008 and the .NET Platform (okay, the author did encourage me to get the book). Let me just use this space to add some things I have noticed in my reading. Here is the first:
Disappearing PopUp
On page 201-202, the book provides a PopUp example. When I tried to execute this example my PopUp would initially appear and then disappear correctly (when clicking on the window), but then I couldn't get it to re-appear! After doing some experimentation I postulated that the issue might be that the IsOpen property was still set to "true" and this was preventing a show event from firing when the IsOpen property is set again (because it is not really changing). When I added "popLink.IsOpen=false;" on the line above "popLink.IsOpen=true;" it seemed to solve the problem.
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