Generate Sequence Diagrams

[gbarrs]

I am trying to generate sequence diagrams from unit tests written in visual studio using C#. I can generate sequence diagrams OK from .NET programmes, it is just unit tests I'm having problems with.  Running the unit tests in the Tests section is fine.  I run mstest with the testcontainer switch and everything works as expected.  I thought I might be able to generate sequence diagrams by runnning the same command in the debug section but this doesn't work.  The code runs fine but I can't get a stack trace.  I've also tried using Attach to attach to the running VsTestHost.  This doesn't work either.  Does anyone have any suggestions please?