WCF An error occurred while receiving the HTTP response - wcf

Question

Here's what my WCF service should be returning. When I command PaymentData out of ResponseModel and add other DataMembers in that class it works.
[DataContract]
public class ResponseModel
{
[DataMember]
public PaymentData PaymentData { get; set; }
}
Here's the PaymentData class:
[DataContract]
public class PaymentData
{
[DataMember]
public PaymentType PaymentType { get; set; }
[DataMember]
public string CardNumber { get; set; }
[DataMember]
public DateTime ExpirationDate { get; set; }
/// <summary>
/// If true, then the CardNumber property will contain the token
/// </summary>
[DataMember]
public bool IsCardNumberTokenized { get; set; }
/// <summary>
/// Number on back of credit cards. This value CANNOT be stored anywhere
/// </summary>
[DataMember]
public string CardSecurityValue { get; set; }
[DataMember]
public CardSecurityPresence CardSecurityPresence { get; set; }
}
... and the enums defined in the PaymentData class
[DataContract(Name = "CardSecurityPresenceEnum")]
public enum CardSecurityPresence
{
[EnumMember(Value = "1")]
IsPresent = 1,
[EnumMember(Value = "2")]
Illegible = 2,
[EnumMember(Value = "9")]
NoCodeOnCard = 9,
[EnumMember(Value = " ")]
NotSent
}
[DataContract(Name = "PaymentTypeEnum")]
public enum PaymentType
{
[EnumMember]
Visa = CMPWSApiService.TransactionMop.VI,
[EnumMember]
MasterCard = CMPWSApiService.TransactionMop.MC,
[EnumMember]
AmericanExpress = CMPWSApiService.TransactionMop.AX,
[EnumMember]
Discover = CMPWSApiService.TransactionMop.DI,
[EnumMember]
PayPal = CMPWSApiService.TransactionMop.PP,
[EnumMember]
BillMeLater = CMPWSApiService.TransactionMop.BL
}
Does the serialization not like that my variable names have the same names as their classes?
Here's the error from the WCFTest Client:
An error occurred while receiving the HTTP response to
[service url omitted]. This
could be due to the service endpoint binding not using the HTTP
protocol. This could also be due to an HTTP request context being
aborted by the server (possibly due to the service shutting down). See
server logs for more details.
Server stack trace: at
System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException
webException, HttpWebRequest request, HttpAbortReason abortReason)
at
System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan
timeout) at
System.ServiceModel.Channels.RequestChannel.Request(Message message,
TimeSpan timeout) at
System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message
message, TimeSpan timeout) at
System.ServiceModel.Channels.ServiceChannel.Call(String action,
Boolean oneway, ProxyOperationRuntime operation, Object[] ins,
Object[] outs, TimeSpan timeout) at
System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage
methodCall, ProxyOperationRuntime operation) at
System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage
message)
Exception rethrown at [0]: at
System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage
reqMsg, IMessage retMsg) at
System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&
msgData, Int32 type) at ICreditCardService.TestAuth() at
CreditCardServiceClient.TestAuth()
Inner Exception: The underlying connection was closed: An unexpected
error occurred on a receive. at
System.Net.HttpWebRequest.GetResponse() at
System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan
timeout)
Inner Exception: Unable to read data from the transport connection: An
existing connection was forcibly closed by the remote host. at
System.Net.Sockets.NetworkStream.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)
Inner Exception: An existing connection was forcibly closed by the
remote host 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)

Answer 1

In CardSecurityPresenceEnum I had a enum member called NotSent that was not initialized to a value. For some reason that was hanging things up.