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

As SQL and Java Learner said in a comment:

Open the VS Installer and ensure that the Blend SDK is installed, when you do this, you'll have a reference to the 4.5 version without having to modify the config file or some other file. Failing to have the Blend SDK installed means you won't be able to change it from 4 to 4.5.

This worked for me.