using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(HashString("test","12345678"));

    }

    public static string HashString(string StringToHash, string HashKey)

    {

        System.Text.UTF8Encoding myEncoder = new System.Text.UTF8Encoding();

        byte[] Key = myEncoder.GetBytes(HashKey);

        byte[] Text = myEncoder.GetBytes(StringToHash);

        System.Security.Cryptography.HMACSHA256 mySHA = new System.Security.Cryptography.HMACSHA256(Key);

        byte[] HashCode = mySHA.ComputeHash(Text);

        string hashHex =  BitConverter.ToString(HashCode).Replace("-", "");

        string hashBase64 = Convert.ToBase64String(HashCode);

        return String.Concat(hashHex.ToLower(),"|",hashBase64);

    }

}