using System;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        //Console.WriteLine("Hello World");

        HashSh1("Technology");

    }

​

    static string HashSh1(string input)

    {

        using (SHA1Managed sha1 = new SHA1Managed())

        {

            var hashSh1 = sha1.ComputeHash(Encoding.UTF8.GetBytes(input));

            // declare stringbuilder

            var sb = new StringBuilder(hashSh1.Length * 2);

            // computing hashSh1

            foreach (byte b in hashSh1)

            {

                // "x2"

                sb.Append(b.ToString("X2").ToLower());

            }

            // final output

            Console.WriteLine(string.Format("The SHA1 hash of {0} is: {1}",input,sb.ToString()));

            return sb.ToString();

        }

    }

}