There is a legacy application developed by WPF. There are a lot of projects in the application, including several UI projects. The problem is that in one of these UI projects in the context menu there is no Add / Resource Dictionary option ... I compare two "neighboring" projects - in one there is this option, in the other there is not, although the first one is the same and the links to the libraries are also they are the same.
By the way, in the same project in the context menu the Design in Blend option is missing ...
I work with Visaul Studio 2015 Enterprise