Format int with custom format string in CSharp

using System;/*from  w ww. j av  a 2  s  .  c om*/
using System.Globalization;

public class MainClass
{
   public static void Main()
   {
        int number2 = 42;
        string value2 = number2.ToString("My Number = #");
        Console.WriteLine(value2);
   }
}