Since people above act like idiots, let me explain.
.exe is an extension for an executable process. It is scripted in languages alike C++. While .cs is an extension for a file scripted in Sanny Builder using CLEO language and the .cs (CLEO script) itself is loaded by CLEO.asi which is scripted in C++ if I'm not wrong.
So they are two different languages and they are not transferable. It would have to be scripted from scratch.
Basically you're asking for an apple in orange's skin.