partial void Deletet_Line(t_Line instance);
partial void Updatet_Line(t_Line instance);
private void detach_t_Lines2(t_Line entity) { this.SendPropertyChanging(); entity.t_GPSPoint2 = null; }
partial void Insertt_Line(t_Line instance);
private void attach_t_Lines1(t_Line entity) { this.SendPropertyChanging(); entity.t_GPSPoint1 = this; }