partial void DeleteCoursesLevel(CoursesLevel instance);
partial void UpdateCoursesLevel(CoursesLevel instance);
private void detach_CoursesLevels(CoursesLevel entity) { this.SendPropertyChanging(); entity.Level = null; }
partial void InsertCoursesLevel(CoursesLevel instance);
private void attach_CoursesLevels(CoursesLevel entity) { this.SendPropertyChanging(); entity.Level = this; }