i am getting The remote server returned an error: (415)

Error: Cannot obtain Metadata from http://localhost:1199/test.svc If this is a Windows (R) Communication Foundation service to which you have access, please check that you have enabled metadata publishing at the specified address. For help enabling metadata publishing, please refer to the MSDN documentation at http://go.microsoft.com/fwlink/?LinkId=65455.WS-Metadata Exchange Error URI: http://localhost:1199/test.svc Metadata contains a reference that cannot be resolved: 'http://localhost:1199/test.svc'. Content Type application/soap+xml; charset=utf-8 was not supported by service http://localhost:1199/test.svc. The client and service bindings may be mismatched. The remote server returned an error: (415) Cannot process the message because the content type 'application/soap+xml; charset=utf-8' was not the expected type 'text/xml; charset=utf-8'..HTTP GET Error URI: http://localhost:1199/test.svc There was an error downloading 'http://localhost:1199/test.svc'. The request failed with the error message:--

Service

The service encountered an error.

An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true,

whose value is:System.InvalidOperationException: An exception was thrown in a call to a

WSDL export extension: System.ServiceModel.Description.DataContractSerializerOperationBehavior contract: http://tempuri.org/:test---->

System.Runtime.Serialization.InvalidDataContractException: Type 'System.Runtime.Serialization.ExtensionDataObject' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. If the type is a collection, consider marking it with the CollectionDataContractAttribute. See the Microsoft .NET Framework documentation for other supported types. at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.ThrowInvalidDataContractException(String message, Type type) at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract(Int32 id, RuntimeTypeHandle typeHandle, Type type) at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation(Int32 id, RuntimeTypeHandle typeHandle, Type type) at System.Runtime.Serialization.DataContractSet.GetDataContract(Type clrType) at System.Runtime.Serialization.DataContractSet.AddClassDataContract(ClassDataContract classDataContract) at System.Runtime.Serialization.DataContractSet.InternalAdd(XmlQualifiedName name, DataContract dataContract) at System.Runtime.Serialization.DataContractSet.AddClassDataContract(ClassDataContract classDataContract) at System.Runtime.Serialization.DataContractSet.InternalAdd(XmlQualifiedName name, DataContract dataContract) at System.Runtime.Serialization.DataContractSet.Add(Type type) at System.Runtime.Serialization.XsdDataContractExporter.Export(Type type) at System.ServiceModel.Description.MessageContractExporter.ExportType(Type type, String partName, String operationName, XmlSchemaType& xsdType) at System.ServiceModel.Description.DataContractSerializerMessageContractExporter.ExportBody(Int32 messageIndex, Object state) at System.ServiceModel.Description.MessageContractExporter.ExportMessage(Int32 messageIndex, Object state) at System.ServiceModel.Description.MessageContractExporter.ExportMessageContract() at System.ServiceModel.Description.WsdlExporter.CallExtension(WsdlContractConversionContext contractContext, IWsdlExportExtension extension) --- End of inner ExceptionDetail stack trace --- at System.ServiceModel.Description.ServiceMetadataBehavior.MetadataExtensionInitializer.GenerateMetadata() at System.ServiceModel.Description.ServiceMetadataExtension.EnsureInitialized() at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.InitializationData.InitializeFrom(ServiceMetadataExtension extension) at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.GetInitData() at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.TryHandleDocumentationRequest(Message httpGetRequest, String[] queries, Message& replyMessage) at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.ProcessHttpRequest(Message httpGetRequest) at SyncInvokeGet(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc& rpc) at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)

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