Numerous instances of VBCSCompiler.exe

Question

I just recently downloaded and installed Visual Studio Professional 2015 (14.0.23107.0). The first time I opened up our solution (28 projects) and performed a Build -> Rebui

Answer 1

As of November 22, 2015 this issue was still happening to me in the Visual Studio 2015 community edition. My laptop was starting to double as a space heater with all of the instances of VBCSCompiler running full throttle.

The only fix that worked for me was to locate the file VBCSCompiler.exe in the /bin/roslyn directory of the web application and change security permissions on it.

You need to deny read & execute permission for the AppPool that your web app is running under.