Compute MD5 hash

Main.cs

//Compute md5
using System.Security.Cryptography;
using System.Text;

string code = "Hello, World!";
string hash;

using (MD5 md5 = MD5.Create())
{
    byte[] retVal = md5.ComputeHash(Encoding.Unicode.GetBytes(code));
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < retVal.Length; i++)
    {
        sb.Append(retVal[i].ToString("x2"));
    }
    hash = sb.ToString();
}