public Ellipse(clsDiem A, clsDiem B)
 {
     begin = A;
     end   = B;
 }
 public Line(clsDiem A, clsDiem B)
 {
     begin = A;
     end   = B;
 }
 public Ellipse()
 {
     begin = new clsDiem(0, 0);
     end   = new clsDiem(0, 0);
 }
 public Line()
 {
     begin = new clsDiem(0, 0);
     end   = new clsDiem(0, 0);
 }