WPF designer stops working

Visual Studio 2015 Community update 3

The WPF designer stops working showing errors if I include a clr-namespace reference to the application’s assembly.

In another thread (https://talk.remobjects.com/t/vs-2017-wpf-invalid-markup/14049) I already reported this issue for another version of Elements and VS. Nobody answered, I turned to VS2015 and now I am in the same.

This other problem (https://talk.remobjects.com/t/clr-namespace-problem/17285) may also be related.

Example project:

WPFTest.rar (36.0 KB)

VS capture image:

Thanks, logged as bugs://80912

bugs://80912 got closed with status fixed.