using System;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(HashEmailForGravatar("uremailid@domain.com"));

    }   

    public static string HashEmailForGravatar(string email)

{

    // Create a new instance of the MD5CryptoServiceProvider object.  

    MD5 md5Hasher = MD5.Create();

    // Convert the input string to a byte array and compute the hash.  

    byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(email));

    // 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.  

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

    {

        sBuilder.Append(data[i].ToString("x2"));

    }

    return sBuilder.ToString();  // Return the hexadecimal string. 

}

}

​

​