using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        var hash = GenerateHash(string.Empty);

        Console.WriteLine(GetHexStringOfHash(hash));

    }

    public static byte[] GenerateHash(string input)

    {

        byte[] bytes = Encoding.Unicode.GetBytes(input);

        byte[] hash = SHA256.Create().ComputeHash(bytes, 0, bytes.Length);

​

        return hash;

    }

    public static string GetHexStringOfHash(byte[] data)

    {

        // Create a new Stringbuilder to collect the bytes

        // and create a string.

        var sBuilder = new StringBuilder();

​

        // Loop through each byte of the hashed data

        // and format each one as a hexadecimal string.

        foreach (byte t in data)

        {

            sBuilder.Append(t.ToString("x2"));

        }

​

        // Return the hexadecimal string.

        return sBuilder.ToString();

    }

}