代码在visual studio 2012中没有遇到断点

I have a mvc c# web application i am building in vs 2012, I put a breakpoint on the controller but that breakpoint is never hit, i get the results so i know that code is running. whats weird is that it doesnt even give the error "no symbols have been loaded" and make the break point hollow. the break point remains solid. Any ideas whats happening?I have a mvc c# web application i am building i