How to find reason of failed Build without any error or warning

Question

I have a WebApplication which contains reference to WCF services.

While building using Visual Studio 2010, Build fails without any error or warning. However building

Answer 1

What solved it for me was deleting the .vs folder from the root of the solution and restarting Visual Studio.

Also maybe important to say that even though the errors were not showing in the Error List pane, they were still present in the Output from the Build.