using System;

using System.Text;

using System.Security.Cryptography;

​

public class Program {

    public static void Main() {

        var sha512 = new SHA512Managed();

        byte[] hash = sha512.ComputeHash(Encoding.UTF8.GetBytes("teste"));

        var result = new StringBuilder();

        foreach (byte b in hash) result.Append($"{b:x2}");

        Console.WriteLine(result);

    }

}