static string base36Chars = "0123456789abcdefghijklmnopqrstuvwxyz";
static char[] base36CharArray = base36Chars.ToCharArray();            
 
 
/// <summary>
/// Encodes an integer into a string by mapping to alpha and digits (36 chars)
/// chars are embedded as lower case
/// 
/// Example: 4zx12ss
/// </summary>

private static String base32Chars = "ybndrfg8ejkmcpqxot1uwisza345h769";
 
private void Test()
{
          RandomNumberGenerator rng = RandomNumberGenerator.Create();
          byte[] randomBytes = new byte[7];
          string uniqueID = string.Empty;
          uniqueID = Base32Encode(randomBytes);
}