I am creating a C# WPX application, the window previously would open when test-running, but for whatever reason no longer does. I have not modified the XAML at all, and have not modified any of the variables which are binded within, afaik. Is there some reason this may happen that you could explain to help me out?

Also, if I alt+tab, the window does not appear in the windows list. Thought maybe somehow it opened but just was off-screen somehow; this is not the case.

I have tried running the executable thinking it may be an issue with Visual Studio somehow not loading it for some other reason, same thing, application runs but does not appear visibly. Had to close it via ctrl+shift+esc.