using System;

using System.Security.Cryptography;

using System.Text;

using System.Web;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(HttpUtility.UrlEncode(GetToken("TEST")));

    }

    public static string GetToken(string input)

   {

       // Token prepare

       using (var alg = SHA256.Create())

       {

           // Raw bytes retrieval

           var tokenBytes = Encoding.UTF8.GetBytes(input);

​

           // Token compute and encode

           return Convert.ToBase64String(alg.ComputeHash(tokenBytes));

       }

   }

}