Windows phone WebClient

Question

I am use WebClient to get page from web, when i get google start page all ok but when i get page from vk api WebClient return Serer not found, but browser open this page normal my code:

private void log_Click(object sender, RoutedEventArgs e)
{
    string auth;
    string login = Uri.EscapeUriString(this.login.Text);
    string password = Uri.EscapeUriString(this.pass.Password);
    auth = "https://api.vk.com/oauth/token";
    auth += "?grant_type=password" + "&client_id=id&client_secret=code&username=" + login + "&password=" + password + "&scope=notify,friends,messages";

    //auth = "https://google.com/";

    WebClient client = new WebClient();
    client.DownloadStringCompleted +=new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
    Uri.EscapeUriString(auth);
    client.DownloadStringAsync(new Uri(auth));
}
void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
    if (e.Error == null)
         MessageBox.Show("Using WebClient: " + e.Result);

    else
        MessageBox.Show(e.Error.Message);
}

Answer 1

This happens only for https calls with non-200 response status. If you receive Not found with right credentials, check out your request parameters.

Try this workaround for non-200:

client.AllowReadStreamBuffering = true;

Also, I see this line Uri.EscapeUriString(auth); which I think must be auth = Uri.EscapeUriString(auth);