The Point class is derived from System.Object.
using System;
class Point
{
public int x, y;
public Point(int x, int y)
{
this.x = x;
this.y = y;
}
public override bool Equals(object obj)
{
if (obj.GetType() != this.GetType()) return false;
Point other = (Point) obj;
return (this.x == other.x) && (this.y == other.y);
}
public override int GetHashCode()
{
return x ^ y;
}
public override String ToString()
{
return String.Format("({0}, {1})", x, y);
}
public Point Copy()
{
return (Point) this.MemberwiseClone();
}
}
public sealed class App {
static void Main()
{
Point p1 = new Point(1,2);
Point p2 = p1.Copy();
Point p3 = p1;
Console.WriteLine(Object.ReferenceEquals(p1, p2));
Console.WriteLine(Object.Equals(p1, p2));
Console.WriteLine(Object.ReferenceEquals(p1, p3));
Console.WriteLine("p1's value is: {0}", p1.ToString());
}
}
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