using System;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        // input, plain text here

        string plainText = "Technology crowds";

        string hashedData = ComputeStringToSha256Hash(plainText);

        // Ouput of plaintext to Sha256Hash 

        Console.WriteLine(string.Format("The SHA256 hash of {0} is: {1}",plainText,hashedData));

​

    }

    static string ComputeStringToSha256Hash(string plainText)

        {

            // Create a SHA256 hash from string   

            using (SHA256 sha256Hash = SHA256.Create())

            {

                // Computing Hash - returns here byte array

                byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(plainText));

​

                // now convert byte array to a string   

                StringBuilder stringbuilder = new StringBuilder();

                for (int i = 0; i < bytes.Length; i++)

                {

                    stringbuilder.Append(bytes[i].ToString("x2"));

                }

                return stringbuilder.ToString();

            }

        }

}