using System;

using System.Security.Cryptography;

using System.Text;

using System.Web;

public class Program

{

    public static void Main()

    {

            using (SHA256 hashGenerator = SHA256.Create())

            {

                string hash = Convert.ToBase64String(hashGenerator.ComputeHash(Encoding.ASCII.GetBytes("/DCat/SphereTestFileMoniker_313350489".ToLowerInvariant())));

                Console.WriteLine(HttpUtility.UrlEncode(hash));

            }

    }

}