Fixed order of validation checks in DfoLauncher.StartDfo(). If the Params property was null, it would throw an undocumented NullReferenceException instead of an ArgumentNullException as documented.
Fixed order of validation checks in DfoLauncher.StartDfo(). If the Params property was null, it would throw an undocumented NullReferenceException instead of an ArgumentNullException as documented.

LHCGreg/DFOCP