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

I want to expand on Sasse's answer.

To fix the problem with Visual Studio 2015 Update 2 I had to build each project one at a time and look at the output window after each build.

One project gave me

"The type or namespace name 'SomeNamespace' does not exist in the namespace 'BeforeSomeNamespace' (are you missing an assembly reference?)".

There was no error in the Error List window but the assembly had a yellow warning sign under "References".

I then saw that the referencing project targeted 4.5.1 and the referenced project 4.6.1. Changing 4.6.1 to 4.5.1 allowed the overall build to succeed.