internal AbortHelper(IJobContext jobContext, bool enforceSingleAbortException, bool requireEventHandler)
 {
     m_enforceSingleAbortException = enforceSingleAbortException;
     m_requireEventHandler         = requireEventHandler;
     m_syncRoot = new object();
     if (jobContext != null)
     {
         m_jobContext = jobContext;
         jobContext.AddAbortHelper(this);
     }
 }