|     | point/2d3d/Point.cs - The class Point2D. | Lecture 7 - slide 11 : 40 Program 1 | 
using System;
public class Point2D {
  private double x, y;
  public Point2D(double x, double y){
   this.x = x; this.y = y;
  }
  public double X{
    get {return x;}
  }
  public double Y{
    get {return y;}
  }
  public void Move(double dx, double dy){
    x += dx; y += dy;
  }
  public override string ToString(){
    return "Point2D: " + "(" + x + ", " + y + ")" + ".";
  }
}