I have a TFS project at $/src/main/MyProject/MyProject.csproj
It has a reference to a DLL at $/dependencies/dependency.dll.
The way I want things to work is that when my colleagues get MyProject, or open it in Visual Studio, I want TFS to go get the latest dependency.dll as well.
(In a similar way, I've actually bound MyProject to my solution in $/src/main/MySolution/MySolution.sln. So if a user gets MySolution and opens MySolution.sln then Visual Studio will go get MyProject as well. I just want to extend this to the next level, that of binding a file to a project.)