/// <summary>
 /// Doc Workflow Manager
 /// </summary>
 private DocWorkflowManager() : base()
 {
     if (_mgr == null)
     {
         _mgr = this;
     }
 }
 /// <summary>
 ///Get Document Workflow Manager
 /// </summary>
 /// <returns>mgr</returns>
 public static DocWorkflowManager Get()
 {
     if (_mgr == null)
     {
         _mgr = new DocWorkflowManager();
     }
     return(_mgr);
 }