The assembly with display name 'VJSharpCodeProvider' failed to load

Question

I added an AjaxToolkit:AutoCompleteExtender to my ASP.Net 3.5 application. The web service lives in the same web application. Now I am getting this error when I hit F5/Debug

Answer 1

This happened to me after a BSOD on my machine. Clearing the AppData/Local/Temp/Temporary ASP.NET Files/ folder did it for me, I guess the temp files got corrupted as a result of the crash.