从Web应用程序向HttpWebRequest添加.pfx证书失败

Question

I have created a Asp.net web application-C#, where I need to send a HttpWebRequest with a .pfx certificate.

I have installed the certificate to the personal certificates folder(added rights for user NETWORK SERVICE) and able to see it in the X509Certificate2Collection and no issues while adding the certificate to the HttpWebRequest.

But it throws cannot connect to server error while fetching the response (HttpWebResponse)req.GetResponse()

I am facing this issue only from web application, the same code works fine(got the correct response) when i tried using a C# console application.

            X509Store oLocalMachineStore = new X509Store(StoreName.My, StoreLocation.LocalMachine);
            X509Certificate2Collection oCertColl;
            X509Certificate oCert = new X509Certificate();
            oLocalMachineStore.Open(System.Security.Cryptography.X509Certificates.OpenFlags.ReadOnly);
            oCertColl = oLocalMachineStore.Certificates.Find(System.Security.Cryptography.X509Certificates.X509FindType.FindByIssuerName, "mycertificate issuer", false);
            oLocalMachineStore.Close();
            foreach (X509Certificate oCertFromStore in oCertColl)
            {
                if (oCertFromStore.Issuer.Contains("mycertificate issuer"))
                {
                    oCert = oCertFromStore;
                    oCert.Import(@"certlocation\mycertificate.pfx", "pwd", X509KeyStorageFlags.MachineKeySet);
                    break;
                }
            }

            HttpWebRequest req = (HttpWebRequest)WebRequest.Create("destination URL");
            req.ClientCertificates.Add(oCert);

            req.UserAgent = "LOL API Client";
            req.Accept = "application/json";
            req.Method = WebRequestMethods.Http.Get;

            string result = null;
            using (HttpWebResponse resp = (HttpWebResponse)req.GetResponse())
            {
                StreamReader reader = new StreamReader(resp.GetResponseStream());
                result = reader.ReadToEnd();
            }

Answer 1

The issue got resolved after adding proxy to the http request.

req.Proxy = New Net.WebProxy("ProxyURL", False);

But still i have no idea, how it worked when i tried with the same code from a console application with out adding proxy.

If anyone has any idea on this please share.