ФОС базовое соединение закрыто: непредвиденная ошибка при приеме

я использую приложение RestClient для связи с моей службой WCF .и я получаю следующее исключение

The underlying connection was closed: An unexpected error occurred on a receive.

это код C#, который я использую

            string q = string.Format(@"xxxxxxxxxxxxxxxxxxxxxxxxxxx");
            WebClient client = new WebClient();
            string Url = string.Format("{0}/Get?queries={1}", BaseUrl,HttpUtility.UrlEncodeUnicode(q));
            client.Headers.Add(HttpRequestHeader.ContentType, "application/json");
            var result = client.DownloadString(Url);
            Console.WriteLine("======================output================================");
            Console.WriteLine(result);
            Console.WriteLine("===========================================");

вот сообщение об ошибке

System.Net.WebException was caught
  HResult=-2146233079
  Message=The underlying connection was closed: An unexpected error occurred on a receive.
  Source=System
  StackTrace:
       at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
       at System.Net.WebClient.DownloadString(Uri address)
       at System.Net.WebClient.DownloadString(String address)
       at RestClient.Program.GetRecordsTest() in C:UsersWiemonDownloadsRestAppClientRestAppClientProgram.cs:line 118
  InnerException: System.IO.IOException
       HResult=-2146232800
       Message=Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
       Source=System
       StackTrace:
            at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
            at System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
            at System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
            at System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
            at System.Net.Security._SslStream.Read(Byte[] buffer, Int32 offset, Int32 count)
            at System.Net.TlsStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
       InnerException: System.Net.Sockets.SocketException
            HResult=-2147467259
            Message=An existing connection was forcibly closed by the remote host
            Source=System
            ErrorCode=10054
            NativeErrorCode=10054
            StackTrace:
                 at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
                 at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            InnerException: 

вот моя привязка

<binding name="wsHttpEndpoint" >
                    <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
                    <security mode="Transport">
                        <transport clientCredentialType="Certificate" />
                        <message clientCredentialType="Certificate" />
                    </security>
                </binding>

и мое поведение конечной точки, а не то, что я установил maxItemsInObjectGraph="2147483647"

<behavior name="MyEndpointBehavior">
                    <dataContractSerializer maxItemsInObjectGraph="2147483647" />
                    <clientCredentials>
                        <clientCertificate findValue="xxxxxxxxxxxxxxxxxx" x509FindType="FindBySubjectName" storeLocation="LocalMachine" storeName="My" />
                        <serviceCertificate>
                            <authentication certificateValidationMode="None" revocationMode="NoCheck" />
                        </serviceCertificate>
                    </clientCredentials>
                </behavior>