关于使用OpenContactsNet导入MSN联系人的问题"基础连接已经关闭: 未能为 SSL/TLS 安全通道建立信任关系"

在使用OpenContactsNet导入MSN联系人时，报基础连接已经关闭: 未能为 SSL/TLS 安全通道建立信任关系。郁闷了好久，请高人指点，不胜感谢!
部分代码如下：

           UriBuilder urib = new UriBuilder();
         urib.Scheme = "HTTPS";
         urib.Path = string.Format( "/{0}/LiveContacts", credential.UserName );
         urib.Host = "cumulus.services.live.com";
         urib.Port = 443;
         HttpWebRequest request = ( HttpWebRequest ) WebRequest.Create( urib.Uri );
         string authHeader = string.Format( "WLID1.0 t=\"{0}\"", ticket );
         request.Headers.Add( "Authorization", authHeader );
         WebResponse response = request.GetResponse();//这句就报以上的错误:"基础连接已经关闭: 未能为 SSL/TLS 安全通道建立信任关系" --------------------编程问答-------------------- HttpWebRequest request = ( HttpWebRequest ) WebRequest.Create( urib.Uri );
上加行
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);

然后再加两个函数
public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        { // Always accept
            return true;
        }
        public bool CheckValidationResult(ServicePoint sPoint, System.Security.Cryptography.X509Certificates.X509Certificate cert, WebRequest wRequest, int certProb)
        {
            // Always accept
            return true;
        } --------------------编程问答-------------------- --------------------编程问答-------------------- 帮顶！！！ --------------------编程问答-------------------- 看看：



private void button6_Click(object sender, EventArgs e)//下载数据文件

        {

            string downloadAdd = "https://scm.auchan.com.cn/php/scm_items_stat_download.php?sup_no=au&code=all";

            string saveFile = "d:\\a.xls";

            if (downfile(downloadAdd, saveFile))

            {

                MessageBox.Show("下载完毕！");

            }

            else

            {

                MessageBox.Show("下载过程中出现错误:");

            }

        }

        public bool downfile(string url, string LocalPath)

        {

            try

            {

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

                Uri u = new Uri(url);

                HttpWebRequest mRequest = (HttpWebRequest)WebRequest.Create(u);

                mRequest.Method = "GET";

                mRequest.ContentType = "application/x-www-form-urlencoded";

                HttpWebResponse wr = (HttpWebResponse)mRequest.GetResponse();

                Stream sIn = wr.GetResponseStream();

                FileStream fs = new FileStream(LocalPath, FileMode.Create, FileAccess.Write);

                long length = wr.ContentLength;

                long i = 0;                

                while (i < length)

                {

                    byte[] buffer = new byte[1024];

                    i += sIn.Read(buffer, 0, buffer.Length);

                    fs.Write(buffer, 0, buffer.Length);                   

                }

                sIn.Close();

                wr.Close();

                fs.Close();

                return true;

            }

            catch (WebException exp)

            {

                MessageBox.Show(exp.Message, "error");

                return false; 

            }



        }

        public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)

        {   //   Always   accept   

            return true;

        }

命名空间加上

using System.Net.Security;

using System.Security.Authentication;

using System.Security.Cryptography.X509Certificates;

--------------------编程问答-------------------- UP --------------------编程问答-------------------- 哈哈谢谢分享了
--------------------编程问答-------------------- 还是有问题。。这个东西报错了！ --------------------编程问答-------------------- 不行啊！报错：服务法连接到服务器！

补充：.NET技术 ,  ASP.NET