using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Encode(new Guid("2baaf1ad-a05d-4a12-a9c0-c507720f471b")));

        Console.WriteLine(Encode(Guid.NewGuid()));

    }

    public static string Encode(Guid guid)

     {

          Console.WriteLine(guid.ToString());

         string encoded = Convert.ToBase64String(guid.ToByteArray());

         //encoded = encoded.Replace("/", "_").Replace("+", "-");

         return encoded.TrimEnd('=');

     }

}