using System;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        string input = "0V2uClXay+3oDdXWRMsFRg==";

        using (var md5 = MD5.Create())

        {

            //byte[] hash = md5.ComputeHash(Encoding.Default.GetBytes(input));

            var guid = new Guid("29777064-11af-4ed5-884c-0ec461b0a2fa");

            byte[] toEncodeAsBytes= System.Text.ASCIIEncoding.ASCII.GetBytes("laptop1");

​

            string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);

            Console.WriteLine(returnValue);

        }

    }

}