partial void DeleteStudent_Phone(Student_Phone instance);
 partial void UpdateStudent_Phone(Student_Phone instance);
		private void detach_Student_Phones(Student_Phone entity)
		{
			this.SendPropertyChanging();
			entity.Student = null;
		}
 partial void InsertStudent_Phone(Student_Phone instance);
		private void attach_Student_Phones(Student_Phone entity)
		{
			this.SendPropertyChanging();
			entity.Student = this;
		}