.Net无法创建SSL / TLS安全通道

Question

I am posting xml from a .net application to a third party web service but receive a "could not create SSL/TLS secure channel" error. When I make the request with soapUI it works fine and i get a response. But cant seem to get it from my .net console app.

I have tried setting the security to tls1 and tls12 but still no success. The certificate is installed on the server from which i am making these requests.

Is there anyone who has managed to solve this issue?

Here is a sample of my code

 System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://thirdPartyURL/cgi-bin/XmlProc");
byte[] bytes;
             bytes = System.Text.Encoding.ASCII.GetBytes("myXML");
            request.ContentType = "text/xml; encoding='utf-8'"; 
            request.ContentLength = bytes.Length;
            request.Method = "POST";                
            System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
            Stream requestStream = request.GetRequestStream();
            requestStream.Write(bytes, 0, bytes.Length);
            requestStream.Close();
            HttpWebResponse response;
            response = (HttpWebResponse)request.GetResponse();

Answer 1

Fixed this by doing the following:

1. Changing the .Net Framework to 4.5
2. Installing the certificate in the "Third-Party Root Authorities" store

3. Added this line of code before making the request in my app

   System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

4. Ran the application on a windows server 2012 instead of windows server 2008. It might be a case that windows server 2008 does not support TLS v1.2