基础连接已经关闭: 未能为SSL/TLS 安全通道建立信任关系

#regionprivatestaticboolValidateServerCertificate解决Error"基础连接已经关闭:未能为SSL/TLS安全通道建立信任关系。"
///<summary>
///解决Error"基础连接已经关闭:未能为SSL/TLS安全通道建立信任关系。"
///</summary>
///<paramname="sender"></param>
///<paramname="certificate"></param>
///<paramname="chain"></param>
///<paramname="sslPolicyErrors"></param>
///<returns></returns>
privatestaticboolValidateServerCertificate(objectsender,X509Certificatecertificate,X509Chainchain,SslPolicyErrorssslPolicyErrors)
{
returntrue;
}
#endregion

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ServicePointManager.ServerCertificateValidationCallback=ValidateServerCertificate;
byte[]responseArray=webClient.UploadValues(url,postValues);

ServicePointManager.ServerCertificateValidationCallback=ValidateServerCertificate;