How to ignore a certificate error with c# 2.0 WebClient - without the certificate

Question

Using Visual Studio 2005 - C# 2.0, System.Net.WebClient.UploadData(Uri address, byte[] data) Windows Server 2003

So here\'s a stripped down version of

Answer 1

I wanted to disable SSL verification for a specific domain without globally deactivating it because there might be other requests running which should not be affected, so I came up with this solution (please note that uri is a variable inside a class:

        private byte[] UploadValues(string method, NameValueCollection data)
        {
            var client = new WebClient();

            try
            {
                ServicePointManager.ServerCertificateValidationCallback +=
                    ServerCertificateValidation;

                returnrclient.UploadValues(uri, method, parameters);

            }
            finally
            {
                ServicePointManager.ServerCertificateValidationCallback -=
                    ServerCertificateValidation;
            }
        }

        private bool ServerCertificateValidation(object sender,
            X509Certificate certificate, X509Chain chain,
            SslPolicyErrors sslPolicyErrors)
        {
            var request = sender as HttpWebRequest;
            if (request != null && request.Address.Host.Equals(
                this.uri.Host, StringComparison.OrdinalIgnoreCase))
                return true;
            return false;
        }