Client certificate

[ilnairb]

My updates are hosted on IIS and it's protected by client certificate, i.e. client certificate is required to access the updates.

Here is my code that subclassed the WebClient.

public class CertificateWebClient : WebClient
{
private readonly X509Certificate2 certificate;
public CertificateWebClient(X509Certificate2 cert)
{
certificate = cert;
}
protected override WebRequest GetWebRequest(Uri address)
{
HttpWebRequest request = (HttpWebRequest)base.GetWebRequest(address);
System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate (Object obj, X509Certificate X509certificate, X509Chain chain, System.Net.Security.SslPolicyErrors errors)
{
return true;
};

  request.ClientCertificates.Add(certificate);
  return request;

}
}

Here is the code does the update

try
{
CertificateWebClient wc = new CertificateWebClient(cert);
FileDownloader fd = new FileDownloader(null);

using (var mgr = new UpdateManager(@"https://mysite.com/ClientDownload/Releases", null, null, fd))
{
    await mgr.UpdateApp();
}

}
catch (Exception ex)
{
throw ex;
}

I receive an exception at mgr.UpdateApp(), the error message is "The underlying connection was closed: An unexpected error occurred on a send.".

May I ask if I missed something? Much appreciated.