title: Get Workspace source control folder in the workflow as an argument
body: <p>I am creating a custom activity for my build in TFS 2010, and I need to pass the activity the source control folder for the current build definition.</p>
  
  <p>I need this as it is defined on the Workspace screen in the build definition screen, such as a string like "$/Project/Folder".</p>
  
  <p>I can't find the appropriate property to pass as an argument to my activity.  I've found BuildDetail.TeamProject just returned "Project", but haven't had much success with anything else.</p>
  
  <p>Any help appreciated.</p>