using System;

using System.Security.Cryptography;

using System.Text;

​

public class HashingUtils

{    

    public static string BytesTohexString(byte[] bytes)

    {

        if (bytes == null || bytes.Length < 1)

        {

            return string.Empty;

        }

​

        int count = bytes.Length;

        StringBuilder builder = new StringBuilder();

        for (int i = 0; i < count; i++)

        {

            string tempHex = Convert.ToString(bytes[i], 16);

            builder.Append(tempHex.Length == 1 ? "0" + tempHex : tempHex);

        }

​

        return builder.ToString();

    }

​

    public static string HashingWithSHA256(string input) 

    {

        SHA256 sha256 = new SHA256CryptoServiceProvider();

        byte[] source = Encoding.Default.GetBytes(input);

        byte[] crypto = sha256.ComputeHash(source);

        string result = BytesTohexString(crypto);

​

        return result;

    }

​

    public static void Main(string[] args)

    {

        string result = HashingUtils.HashingWithSHA256("ICCardNo");

        Console.WriteLine("Encrypted result: " + result);

    }

}