The time when recurring future actions will start. Start time is specified by the user following the Unix cron syntax format. For
            information about cron syntax, go to Wikipedia, The Free Encyclopedia. When StartTime
            and EndTime are specified with Recurrence, they form the boundaries of when the recurring action will start and stop.
             
            
Constraints:
 Declaration Syntax
 Declaration Syntax| C# | 
public string Recurrence { get; set; }