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

TypeLoadException is thrown when the common language runtime cannot find the assembly, the type within the assembly, or cannot load the type.

TypeLoadException uses the HRESULT COR_E_TYPELOAD, that has the value 0x80131522.

For a list of initial property values for an instance of TypeLoadException, see the TypeLoadException constructors.

Source: MSDN