partial void UpdateStudent(Student instance);
 partial void DeleteStudent(Student instance);
 partial void InsertStudent(Student instance);
		private void detach_Students(Student entity)
		{
			this.SendPropertyChanging();
			entity.House = null;
		}
		private void attach_Students(Student entity)
		{
			this.SendPropertyChanging();
			entity.House = this;
		}
		private void detach_Students(Student entity)
		{
			this.SendPropertyChanging();
			entity.Department = null;
		}
		private void attach_Students(Student entity)
		{
			this.SendPropertyChanging();
			entity.Department = this;
		}