Let me share you with one of the weirdest errors I ever encountered. Recently, I have been working on a distributed application which is built from a server and some clients. The clients are Windows Forms applications. Yesterday, I spent a whole day chasing a very weird and strange error - I was getting an exception at the main method (unhandled exception) of the client application. Here is what I got:

The error description was:

Here is an interesting thing that happened to me at work.
For various reasons the application i am working on has a Windows Form in its base, and most of the controls are WPF, part of them are WinForms. The weirdest thing happened to me as i was trying to open a WPF Window from one [...]