using System;
using System.IO;
using System.Text;
class MainClass
{
public static void Main()
{
// Get a byte representation of the int.
byte[] b = BitConverter.GetBytes(123);
// Return the Base64-encoded int.
string str = Convert.ToBase64String(b);
Console.WriteLine(str);
b = Convert.FromBase64String(str);
// Return the decoded int.
int i = BitConverter.ToInt32(b,0);
Console.WriteLine(i);
}
}