title: In MSTest's Test View, how can I get a list of all Tests with no category?
body: <p>I'm using MSTest and most of my unit tests have no <code>TestCategory</code> attribute, but I want to put a few tests into a "Slow" category.  Then I want to be able to easily run all the tests that have no category assigned.</p>
  
  <p>When I go to Test View, I can filter by Test Categories, but I can't put in a keyword of empty.  I can easily find my "Slow" ones, but how to I find my non-Slow ones?  I'm trying to avoid putting a test category on all my tests.</p>
  
  <p>I guess it's not the end of the world if I have to... a search and replace should get them all, but if there's a way to find the non-categorized, I would like to know.</p>