public static string Validate(string encodedResponse)
{
var client = new System.Net.WebClient();
var GoogleReply = client.DownloadString(
string.Format("https://www.google.com/recaptcha/api/siteverify?secret={0}&response={1}",
Recaptcha.SecretKey, encodedResponse));
var captchaResponse = JsonConvert.DeserializeObject<ReCaptchaClass>(GoogleReply);
return captchaResponse.Success;
}