md5.cs

using System;
using System.Text;
using System.Security.Cryptography;

namespace MD5test
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            Console.WriteLine(MD5Hash("Hello World!"));
        }


		public static string MD5Hash(string input)
		{
		    // hash the string
		    MD5 md5 = MD5.Create();
		    byte[] inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
		    byte[] hash = md5.ComputeHash(inputBytes);
		    
		    // convert to hex string
		    StringBuilder sb = new StringBuilder();
		    for (int i = 0; i < hash.Length; i++)
		    {
		    sb.Append(hash[i].ToString("x2"));
		    }
		    return sb.ToString();
		}
    }
}