No exports were found that match the constraint contractname
Issue can be solved this problem by clearing Visual Studio Component Model Cache.
Just delete or rename this folder:
%LocalAppData%\Microsoft\VisualStudio\11.0\ComponentModelCache
or
%LocalAppData%\Microsoft\VPDExpress\11.0\ComponentModelCache
and restart Visual Studio.
The version of Visual Studio you have is specified by the number e.g.
Visual Studio 2012 is
11.0
(as shown above)
Visual Studio 2013 is
12.0
Visual Studio 2015 is
14.0
Visual Studio 2017 is
15.0
For those that don't know:
%LocalAppData%\
is the same as C:\Users\{yourUsername}\AppData\Local
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