using System;

public class Program

{

    public static void Main()

    {

        try{

            byte[] args = Base64DecodeToByteArray("11234");

            Console.WriteLine("Done.");

        }

        catch{

            Console.WriteLine("Failed.");

        }

    }

    private static byte[] Base64DecodeToByteArray(string base64EncodedData)

    {

        return Convert.FromBase64String(base64EncodedData);

    }

}