Create an MD5 hash digest in C#

md5.cs

public static string MD5Hash(string toHash)
{
    string hashed;

    using (MD5 md5 = MD5.Create())
    {
        hashed = string.Join(string.Empty, md5.ComputeHash(Encoding.UTF8.GetBytes(toHash)).Select(b => b.ToString("x2")));
    }

    return hashed;
}