Bitwise operators in C#

using System;

class BitwiseOperators {

    public static void Main(string[] args) {
        if (args.Length < 2) {
            Console.Error.WriteLine("Usage: [filename] <first_number> <second_number>");
            Environment.Exit(1);
        }
        int a = Int32.Parse(args[0]), b = Int32.Parse(args[1]);
        Console.WriteLine("OR: {0} | {1} = {2}", a.ToString(), b.ToString(), (a | b).ToString());
        Console.WriteLine("AND: {0} & {1} = {2}", a.ToString(), b.ToString(), (a & b).ToString());
        Console.WriteLine("XOR: {0} ^ {1} = {2}", a.ToString(), b.ToString(), (a ^ b).ToString());
        Console.WriteLine("Left shift: {0} << {1} = {2}", a.ToString(), b.ToString(), (a << b).ToString());
        Console.WriteLine("Right shift: {0} >> {1} = {2}", a.ToString(), b.ToString(), (a >> b).ToString());
        Console.WriteLine("1's complement: ~{0} = {1}", a.ToString(), (~a).ToString());
    }

}

/*
$ ./bitwise.exe  2 3
OR: 2 | 3 = 3
AND: 2 & 3 = 2
XOR: 2 ^ 3 = 1
Left shift: 2 << 3 = 16
Right shift: 2 >> 3 = 0
1's complement: ~2 = -3
*/