Compilation Error : The type 'ASP.global_asax' exists in both dlls

 Looking into this bin-folder you will probably see two files (an information I found here):

• App_global.asax.dll
• App_global.asax.compiled

Removing these resolves the error. The App_global.asax.dll is generated at runtime too which causes the problem. I am however still investigating how these files got there, so comments are definitely welcome!