using System;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        string issuer = "11050";

        string externalPspAppId = "asd";

        string token = issuer + externalPspAppId;

        var bytes = Encoding.UTF8.GetBytes(token);

        var sha1 = SHA1.Create();

        byte[] tab = sha1.ComputeHash(bytes); 

        string result = BitConverter.ToString(bytes).Replace("-", string.Empty).ToUpper();

        Console.WriteLine(result);

    }

}