public override string ToString() { return String.Format("({0}, {1}, {2})", this.x, this.y, this.z); } }
static void Main(string[] args) { Point2D point2D = new Point2D(5, 5); Console.WriteLine(point2D.ToString()); Point3D point3D = new Point3D(3, 4, 5); Console.WriteLine(point3D.ToString()); }