HTTPS完美解决“请求被中止: 未能创建 SSL/TLS 安全通道”

HttpWebRequest 请求第三方https接口，一直提示未能创建 SSL/TLS 安全通道! 证书验证创建委托一直返回true 也不行。

public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; }

            ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);

设置ServicePointManager.SecurityProtocol也不行，试过Ssl3，Tls,Tls11,Tls12

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

 

导入证书依然不行 

request.ClientCertificates.Add(new X509Certificate(AppDomain.CurrentDomain.BaseDirectory + "sinho1.cer"));

测试完整代码

HttpWebRequest request = null;
            request = (HttpWebRequest)HttpWebRequest.Create(this._UriString);
            request.ContentType = "application/x-www-form-urlencoded";