partial void DeleteTeacherDepartment(TeacherDepartment instance);
partial void UpdateTeacherDepartment(TeacherDepartment instance);
private void detach_TeacherDepartments(TeacherDepartment entity)
{
this.SendPropertyChanging();
entity.Teacher = null;
}
partial void InsertTeacherDepartment(TeacherDepartment instance);
private void attach_TeacherDepartments(TeacherDepartment entity)
{
this.SendPropertyChanging();
entity.Department = this;
}