I know there is another question with exact the same problem, but I went trough all those answers, and none helped me. :( (This was the question.)
I just created a new A
In my case, there was an error, but it was not properly parsed out by VS and shown in the "Error List" window. To find it, you much view the ol "Output" from build window and parse through the messages starting from top down and resolve the actual error. M$, please fix! This is a huge waste of time of the worlds collective developers.