问System.IO.IOException:无法将数据写入传输连接:现有连接已被远程主机强制关闭

EN

System.IO.IOException: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host. --->   System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at System.Net.Security.SslStream.AuthenticateAsClient(String targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, Boolean checkCertificateRevocation)
at SslTcpClient.Open() in d:\Ishit\Fix\Webservice development - XML communication protocol\Work-by-Developer\ishit\EPP_Webservice\App_Code\SslTcpClient.cs:line 102
at EPP_Transaction_Webservice.Hello() in d:\Ishit\Fix\Webservice development - XML communication protocol\Work-by-Developer\ishit\EPP_Webservice\App_Code\EPP_Transaction_Webservice.cs:line 62