c#中https通讯如何添加证书

c#如何在https在通讯中需要添加证书密码

public static class HTTPS
    {
       // byte[] certificate = Properties.Resources.client1;
         //2.定义方法：
        private static bool RemoteCertificateValidate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)
        {
            //为了通过证书验证，总是返回true
            return true;
        }
        public static int HttpRequest(string GetOrPost, string Url, string RequestInfo, ref string ResponseInfo, int TimeOutMs)
        {
            try
            {
                ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(RemoteCertificateValidate);
              //  CookieContainer CookieContainer = new CookieContainer();
              
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                X509Certificate2 cer = new X509Certificate2(@"./cl1.p12", "123");
                X509Store store = new X509Store(StoreName.My,StoreLocation.LocalMachine);
                store.Open(OpenFlags.MaxAllowed);
                store.Remove(cer);
                store.Add(cer);
                store.Close();
               // request.ProtocolVersion = HttpVersion.Version11;
                //ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
                //ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
                //ServicePointManager.Expect100Continue = false;
                request.ClientCertificates.Add(cer);
                request.Method = GetOrPost;
                request.KeepAlive = false;
               // request.CookieContainer = CookieContainer;
                request.AllowAutoRedirect = false;
                request.Timeout = TimeOutMs;
               // request.ContentType =  "application/x-www-form-urlencoded;charset=utf-8";

                int RequestLength = Encoding.UTF8.GetByteCount(RequestInfo);
                request.ContentLength = RequestLength;

                //3.在WebRequest请求之前调用：
                ServicePointManager.ServerCertificateValidationCallback += RemoteCertificateValidate;
                
                if (GetOrPost == "POST")
                {
                    Stream RequestStream = request.GetRequestStream();
                    RequestStream.Write(Encoding.UTF8.GetBytes(RequestInfo), 0, RequestLength);
                    RequestStream.Close();
                    
                }

                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream ResponseStream = response.GetResponseStream();
                StreamReader StreamReader = new StreamReader(ResponseStream, Encoding.UTF8);
                ResponseInfo = StreamReader.ReadToEnd();
                StreamReader.Close();
                response.Close();

                return 0;
            }
            catch (Exception ex)
            {
                ResponseInfo = "HTTP通讯异常：" + ex.Message;
                return -1;
            }
        }
    }

以上代码写的很乱，包含了许多不用的设置，仅供参考。