Need to reference 14.0 assemblies of Team Foundation Client to use custom check in policy within Visual Studio 2015

I am trying to create an install for our custom check in policy that I already have written for VS2010, VS2012, and VS2013.   We want to use Visual Studio 2015 now, and it will require a check-in policy as well.

When creating the dll for the policy to run within Visual Studio, I have always had to change the references to the Team Foundation Client to match the visual studio version.  Presumably, Visual Studio 2015 requires references to the 14.0 assemblies, however when I try to add these references version 14.0 assemblies do not appear.  One of the specific references is Microsoft.TeamFoundation.VersionControl.Client.dll

Am I missing something, or must I set something up to allow Visual Studio 2015 to find these references?

Thanks,

Larry Brooks

Larry