using System;

public class Program

{

    public static void Main()

    {

        tmp t = new tmp();

        t.x = "hello";  

        int h1 = t.GetHashCode();

​

        t.x="goodbye";

        int h2 = t.GetHashCode();

​

        Console.WriteLine("Objects with a single property");

        Console.WriteLine("Are equal:" + (h1 == h2));

        Console.WriteLine("Hash 1: " + h1);

        Console.WriteLine("Hash 2: " + h2);

​

        var tmp2 = new tmp2();

        tmp2.x = "Test";

        tmp2.y = 5;

        var multiPropertyHash1 = tmp2.GetHashCode();

        tmp2.x = "New Value";

        tmp2.y = 15;

        var multiPropertyHash2 = tmp2.GetHashCode();

        Console.WriteLine();

        Console.WriteLine("Objects with multiple properties");

        Console.WriteLine("Are equal:" + (multiPropertyHash1 == multiPropertyHash2));

        Console.WriteLine("Hash 1: " + multiPropertyHash1);

        Console.WriteLine("Hash 2: " + multiPropertyHash2);

        var obj1 = new tmp2();

        obj1.x = "Value 1";

        obj1.y = 1;

        var obj1Hash = obj1.GetHashCode();

        var obj2 = new tmp2();

        obj2.x = "Value 1";

        obj2.y = 1;

        var obj2Hash = obj2.GetHashCode();

        Console.WriteLine();

        Console.WriteLine("Different objects but with the same property values");

        Console.WriteLine("Are equal:" + (obj1Hash == obj2Hash));

        Console.WriteLine("Hash 1: " + obj1Hash);

        Console.WriteLine("Hash 2: " + obj2Hash);

    }

    public class tmp {

        public string x{get;set;}

        public override int GetHashCode()

        {

            return HashCode.Combine(x);

        }

    }

    public class tmp2 {

        public string x {get; set; }

        public int y { get; set; }

        public override int GetHashCode()

        {

            return HashCode.Combine(x, y);

        }

    }

}