internal WorkTime Reduce(WorkTime c) { var w = new WorkTime { Hour = this.Hour, Minute = this.Minute }; w.Hour -= c.Hour; w.Minute -= c.Minute; w.Check(); return(w); }
internal WorkTime Append(int hour, int minute) { var w = new WorkTime { Hour = this.Hour, Minute = this.Minute }; w.Hour += hour; w.Minute += minute; w.Check(); return(w); }