public MyPoint Cong(MyPoint point1, MyPoint point2)
 {
     return(new MyPoint(point1.x + point2.x, point1.y + point2.y));
 }
 public MyPoint Tru(MyPoint point1, MyPoint point2)
 {
     return(new MyPoint(point1.x - point2.x, point1.y - point2.y));
 }
 public MyPoint(MyPoint mypoint)
 {
     this.x = mypoint.x;
     this.y = mypoint.y;
 }