當要求https連線出現：基礎連接已關閉: 無法為 SSL/TLS 安全通道建立信任關係。

HTTPS-SSL-TLS bypass.cs

//參考來源1：http://blog.darkthread.net/post-2010-05-06-webclient-ssl-dismatch.aspx
//參考來源2：http://awei791129.pixnet.net/blog/post/24463385-%5Bc%23%5D-%E7%95%B6%E8%A6%81%E6%B1%82https%E9%80%A3%E7%B7%9A%E5%87%BA%E7%8F%BE%EF%BC%8C%E5%9F%BA%E7%A4%8E%E9%80%A3%E6%8E%A5%E5%B7%B2%E9%97%9C%E9%96%89%3A-%E7%84%A1

關鍵參教
xxx.ServerCertificateValidationCallback = delegate { return true; };

// 狀況一：改連線設定-範例
System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };

// 狀況一：使用HttpWebRequest的解法-範例
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

// Set some reasonable limits on resources used by this request
request.MaximumAutomaticRedirections = 4;
request.MaximumResponseHeadersLength = 4;
request.Timeout = (int)numTimeOut.Value; // milliseconds

// Set credentials to use for this request.
request.Credentials = CredentialCache.DefaultCredentials;
request.AuthenticationLevel = (AuthenticationLevel)cbxAuthLevel.SelectedValue; // AuthenticationLevel.None;

// 排除此Exception觸發：基礎連接已關閉: 無法為 SSL/TLS 安全通道建立信任關係。
// The underlying connection was closed: Could not establish trust relationship for SSL/TLS secure channel
request.ServerCertificateValidationCallback = delegate { return true; }; 

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

// 狀況三：使用WebClient的解法-範例
WebClient wc = new WebClient();
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
string s = wc.DownloadString("https://192.168.1.1/Page.aspx");