We have a solution with over 140 projects and over 13 different configurations, besides the default Debug and Release configurations. I ran into the same problem with one of my projects in this solution. The Add Config Transforms element was grayed out, but I only had the Debug and Release transforms web.config. I believe that this is due to the fact that the project was probably added to the solution after creating all user configurations.
I went into Configuration Manager and noticed that the project does not have all the other configurations available. I had to manually add each missing configuration, specifying a name as well. Once this is done, Add Config Transforms is available.
Jonathan Hensley Sep 02 '14 at 23:12 2014-09-02 23:12
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