Visual Studio 2013, changes not showing in debug

Question

Have recently upgraded to Visual Studio 2013 Pro and am having some teething problems.

Primarily if I change any HTML or CSS in either a .aspx page for Web Forms or

Answer 1

for my case, I tried all the before mentioned answers but nothing worked. and then I went to the system logs and found a hint about failure in loading IIsexpress for the running application. I changed the port that the application used and voila! everything is back to normal. thought this might help someone