using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        string phone = "14129977637";

            string message = "TRAN";

            string dateTime = new DateTime(2018, 08, 07, 15, 56, 06).ToString("yyyyMMdd HHmmss");

​

            using (SHA256Managed mSHA256Managed = new SHA256Managed())

            {

                string mKey = "TMBBANKINGPUBLIC";

                var _UTF8Encoding = new UTF8Encoding();

                string tmp = phone + " " + message + " " + dateTime + " " + mKey;

                byte[] mByte = mSHA256Managed.ComputeHash(_UTF8Encoding.GetBytes(tmp));

                string hex = BitConverter.ToString(mByte).Replace("-", string.Empty);

                //jobLogLogger.LogEvent("WsTMBPrivate - IsValidKey", hex, tmp, "LOG");

                Console.WriteLine(hex);

            }

    }

}