I have two seperate algorithms, one implemented as a windows application and the other as a console application. I need to make the necessary modifications so that I'll be able to run them both from a common GUI (which I still have to write).
what adjustments should I make to the two existing applications? should they both be compiled as class libraries? Should all three be under one solution?
What could be the reason for the following runtime error?

An unhandled exception of type 'System.TypeLoadException' occurred in Unknown Module.
Additional information: Could not load type [...] from assembly [...]