using System.Diagnostics;

​

Int x = 10;

Int y = 20;

​

Int.Swap(x, y);

​

Debug.Assert(x == 20);

Debug.Assert(y == 10);

​

public class Int

{

    private int _value;

​

    public static void Swap(Int x, Int y)

    {

        var tmp = x._value;

        x._value = y._value;

        y._value = tmp;

    }

​

    public static implicit operator Int (int value)

    {

        return new Int { _value = value };

    }

​

    public static implicit operator int(Int value)

    {

        return value._value;

    }

}

​