I\'ve got vs2010 and vs2012 installed side by side. If I open up our MVC site in vs2010 and run it using the development web server it works fine, if I do the same thing in vs2
just clean the solution before you build it. Also, check the size of the folder in which the solution is, before & after clean build; you will surely find some difference. Doing this ensures that you clean/remove unnecessary dlls created after every build which is the cause of delaying the normal flow.