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;
}