How to set “Specific Version” property for project references in Visual Studio

Question

I have got a Visual Studio Solution containing several projects and have set up the references between the projects as project references.

When a reference to an ass

Answer 1

I have found the solution to my problem. It's described pretty detailed here. The problem is not a matter of wrong project references, but more a de/serializing of workflow instances question.

Thanks to everybody who tried to help.