Suddenly, Visual Studio 2010 has stopped behaving as it used to:
I have a solution containing several projects: a Class Library project, an Application project and a Test project.
The Application project is set as default startup project.
Now if I change anything in the Class Library and press F5, Visual Studio does not rebuild the Class Library anymore, so that it runs outdated code.
Same behaviour with the Test project.
What am I doing wrong? I am pretty sure this type of behaviour is new, but I do not know what I have changed.