private void detach_tb_Vertices(tb_Vertice entity)
 {
     this.SendPropertyChanging();
     entity.tb_Grafo = null;
 }
 partial void Updatetb_Vertice(tb_Vertice instance);
 partial void Deletetb_Vertice(tb_Vertice instance);
 partial void Inserttb_Vertice(tb_Vertice instance);