private void detach_TimeTables(TimeTable entity)
		{
			this.SendPropertyChanging();
			entity.Subj_Teach = null;
		}
 partial void UpdateTimeTable(TimeTable instance);
 partial void DeleteTimeTable(TimeTable instance);
		private void attach_TimeTables(TimeTable entity)
		{
			this.SendPropertyChanging();
			entity.Group = this;
		}
 partial void InsertTimeTable(TimeTable instance);
 private void detach_TimeTables(TimeTable entity)
 {
     this.SendPropertyChanging();
     entity.Subj_Teach = null;
 }
 partial void DeleteTimeTable(TimeTable instance);
 partial void UpdateTimeTable(TimeTable instance);
 partial void InsertTimeTable(TimeTable instance);
 private void attach_TimeTables(TimeTable entity)
 {
     this.SendPropertyChanging();
     entity.Group = this;
 }