What is vshost.exe ?

Right next to Visual Studio build of a CLR executable, we notice another executable ending with .vshost.exe

vshost.exe is a hosting process introduced by Visual Studio, for following benefits

• helps in creating App domain and associating debugger to that. Normally this is a slow process, however vshost.exe makes this noticeably fast.
• initializes the debugger for partial trust debugging
• supports intermediate window for design time expression evaluation.

Still don't wish to have *.vshost.exe next your binary, then go to project properties -> Debug

And un-check the option.