TFS Build error - "The specified path, file name, or both are too long..."

I find one tip here. Hope it might be helpful to you.

Currently there are a two workarounds:

Reduce the namespace in workflow x:Class property. This makes the generated file have a shorter name.

Use the subst or mklink command to create mapping so that the path the solution is located in becomes a lot smaller. In team build, the workspace mapping needs to be modified equally.