public static DateTime GetStartDateByDuration(int CalendarId, DateTime FinishDate, int Duration) { return(DbHelper2.RunSpDateTime("Cal_GetStartDateByDuration", DbHelper2.mp("@CalendarId", SqlDbType.Int, CalendarId), DbHelper2.mp("@FinishDate", SqlDbType.DateTime, FinishDate), DbHelper2.mp("@Duration", SqlDbType.Int, Duration))); }