What kind of problem can cause a TypeLoadException?

Question

I have a big and bloated software and I want to add a new GUI element to it. The GUI element was written using XAML and WPF. I created the UI element in a separate assembly,

Answer 1

Possible issues include:

1. The assembly you reference is x64 only and your consumer is x86 or AnyCPU on a 32-Bit CLR
2. Your consumer assembly was compiled against a different version of the referenced assembly

You can try to use FusLogVW to turn on assembly binding logging and check the logfile for more information about what failed.