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

Maybe it could help someone, this problem can be solved by installing the "Blend for Visual Studio SDK for .NET" component, that can be found in Visual Studio 2017 installation:

If you are using VS2019, but have a VS2017 license available, nothing is needed. Just install VS2017 (core) along with this single individual component.