title: Is it possible to specify workflow in a file instead of using the designer available in Visual studio
body: <p>In Windows workflow foundation, 
  is it possible to load the workflow from an external file? The aim is to make a generic workflow controller which takes the state machine workflow from a file and loads it. If I go and use the designer available in VS, the workflow diagram becomes fixed and can be used only for a particular use case but, whereas, I need to make a generic one. </p>