using System;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

         byte[] passBytes = Encoding.UTF8.GetBytes("estech");

         SHA1 sha = new SHA1CryptoServiceProvider();

         byte[] hashPassBytes = sha.ComputeHash(passBytes);

​

         string hashPass = Convert.ToBase64String(hashPassBytes);

        Console.WriteLine(hashPass);

    }

}