[C#] Android C2DM

internal static bool sendAndroidNotification(string message, string registrationID)
{
    const String ClientLoginURL = @"https://www.google.com/accounts/ClientLogin";
    const String C2DMServerURL = @"http://android.apis.google.com/c2dm/send";
    string collapseKey = DateTime.Now.ToShortDateString();

    String AuthTokenParams =
        @"accountType=GOOGLE&Email=" + Properties.Settings.Default.AndroidSenderEmail   // your sender email
        + "&Passwd=" + Properties.Settings.Default.AndroidSenderPassword    // your sender password
        + "&service=ac2dm";
    string authToken = getAndroidAuthToken(ClientLoginURL, AuthTokenParams);

    Dictionary<string, string> data = new Dictionary<string, string>();
    data.Add("data.msg", HttpUtility.UrlEncode(message));  // use UrlEncode() so that I can push messages other than English (like Chinese)

    return sendAndroidPushMessage(C2DMServerURL, registrationID, collapseKey, authToken, data);
}