I believe many of you guys may have already known this. But for those of you like me (who experienced this very recently): when you encounter
“A first chance exception of type 'System.InvalidOperationException'” from C#.NET without displaying any exception in development,
You can press
(Ctrl+Alt+E in Visual Studio) to load this and check "Thrown" for "Common Language Runtime Exception"
Please click following link for the original solution :