The name “Interaction” does not exist in the namespace “http://schemas.microsoft.com/expression/2010/interactivity”

Question

I\'ve used the System.Windows.Interactivity DLL in several projects without any problem. Now in my latest project I can\'t get it to work. I always get the following error:

Answer 1

I had this problem because I was referencing a 4.5 version build of System.Windows.Interactivity but was building my project in .Net 4