C# と VB.NET の質問掲示板

ひとまずパケットとってみたところサーバからのレスポンスがすでに500エラーになってました。
追検証する時間が取れないのでひとまずサーバをTCPで待つコンソールアプリに変更したところ問題は発生しませんでした。

時間が取れたらミニマムな環境で追検証したいと思ってます。

＞レスポンスです(キャプった内容をてけとーにフォーマット)
<SOAP-ENV:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
				   xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" 
				   xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:clr="http://schemas.microsoft.com/soap/encoding/clr/1.0" 
				   SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
	<SOAP-ENV:Header>
		<h4:__CallContext href="#ref-3" xmlns:h4="http://schemas.microsoft.com/clr/soap/messageProperties" SOAP-ENC:root="1"/>
		<a1:LogicalCallContext id="ref-3" xmlns:a1="http://schemas.microsoft.com/clr/ns/System.Runtime.Remoting.Messaging">
			<E2ETrace.ActivityID xsi:type="a2:Guid" xmlns:a2="http://schemas.microsoft.com/clr/ns/System">
				<_a>0</_a>
				<_b>0</_b>
				<_c>0</_c>
				<_d>221</_d>
				<_e>1</_e>
				<_f>0</_f>
				<_g>96</_g>
				<_h>0</_h>
				<_i>0</_i>
				<_j>0</_j>
				<_k>250</_k>
			</E2ETrace.ActivityID>
		</a1:LogicalCallContext>
	</SOAP-ENV:Header>
	<SOAP-ENV:Body>
		<SOAP-ENV:Fault id="ref-1">
			<faultcode id="ref-5">SOAP-ENV:Server</faultcode>
			<faultstring id="ref-6">.****.System.InvalidCastException.-.&#39;TypeNAssembly&#39;.&#39;System.String&#39;?</faultstring>
			<detail xsi:type="a3:ServerFault" xmlns:a3="http://schemas.microsoft.com/clr/ns/System.Runtime.Serialization.Formatters">
				<exceptionType xsi:null="1"/>
				<message xsi:null="1"/>
				<stackTrace xsi:null="1"/>
				<exception href="#ref-7"/>
			</detail>
		</SOAP-ENV:Fault>
		<a2:InvalidCastException id="ref-7" xmlns:a2="http://schemas.microsoft.com/clr/ns/System">
			<ClassName id="ref-8">System.InvalidCastException</ClassName>
			<Message id="ref-9">a?? &#39;TypeNAssembly&#39; a?Ra?aa??a?，a?§a?￣a??a??a?? &#39;System.String&#39; a?≪a?-a?£a?1a??a?§a??a??a??a??a?</Message>
			<Data xsi:null="1"/>
			<InnerException xsi:null="1"/>
			<HelpURL xsi:null="1"/>
			<StackTraceString id="ref-10">
				a?´a? System.Runtime.Serialization.Formatters.Soap.SoapWriter.NameEscape
							(String name)
				a?´a? System.Runtime.Serialization.Formatters.Soap.SoapWriter.Write
							(InternalElementTypeE use, String name, AttributeList attrList, String value, Boolean isNameEscape, Boolean isValueEscape)
				a?´a? System.Runtime.Serialization.Formatters.Soap.SoapWriter.WriteMemberObjectRef
							(NameInfo memberNameInfo, NameInfo typeNameInfo, Int32 idRef)
				a?´a? System.Runtime.Serialization.Formatters.Soap.ObjectWriter.WriteMembers
							(NameInfo memberNameInfo, NameInfo memberTypeNameInfo, Object memberData, 
								WriteObjectInfo objectInfo, NameInfo typeNameInfo, WriteObjectInfo memberObjectInfo, Boolean isAttribute)
				a?´a? System.Runtime.Serialization.Formatters.Soap.ObjectWriter.WriteMemberSetup
							(WriteObjectInfo objectInfo, NameInfo memberNameInfo, NameInfo typeNameInfo, 
								String memberName, Type memberType, Object memberData, WriteObjectInfo memberObjectInfo, Boolean isAttribute)
				a?´a? System.Runtime.Serialization.Formatters.Soap.ObjectWriter.Write
							(WriteObjectInfo objectInfo, NameInfo memberNameInfo, NameInfo typeNameInfo, 
								String[] memberNames, Type[] memberTypes, Object[] memberData, WriteObjectInfo[] memberObjectInfos)
				a?´a? System.Runtime.Serialization.Formatters.Soap.ObjectWriter.Write
							(WriteObjectInfo objectInfo, NameInfo memberNameInfo, NameInfo typeNameInfo)
				a?´a? System.Runtime.Serialization.Formatters.Soap.ObjectWriter.ProcessHeaders
							(Int64 headerId)
				a?´a? System.Runtime.Serialization.Formatters.Soap.ObjectWriter.Serialize
							(Object graph, Header[] inHeaders, SoapWriter serWriter)
				a?´a? System.Runtime.Serialization.Formatters.Soap.SoapFormatter.Serialize
							(Stream serializationStream, Object graph, Header[] headers)
				a?´a? System.Runtime.Remoting.Channels.CoreChannel.SerializeSoapMessage
							(IMessage msg, Stream outputStream, Boolean includeVersions)
				a?´a? System.Runtime.Remoting.Channels.SoapServerFormatterSink.SerializeResponse
							(IServerResponseChannelSinkStack sinkStack, IMessage msg, Boolean bClientIsClr, 
												 ITransportHeaders&#38; headers, Stream&#38; stream)
				a?´a? System.Runtime.Remoting.Channels.SoapServerFormatterSink.ProcessMessage
							(IServerChannelSinkS      ^Hpn?O".E.?4@.}.3£?y?¬A¨dE.P.u?Ii??n≫.P.yy??tack sinkStack, 
								IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, 
								IMessage&#38; responseMsg, ITransportHeaders&#38; responseHeaders, Stream&#38; responseStream)
			</StackTraceString>
			<RemoteStackTraceString xsi:null="1"/>
			<RemoteStackIndex>0</RemoteStackIndex>
			<ExceptionMethod id="ref-11">
						 8.NameEscape.System.Runtime.Serialization.Formatters.Soap, Version=2.0.0.0, Culture=neutral, 
								PublicKeyToken=b03f5f7f11d50a3a.System.Runtime.Serialization.Formatters.Soap.SoapWriter.System.String NameEscape(System.String)
			</ExceptionMethod>
			<HResult>-2147467262</HResult>
			<Source id="ref-12">System.Runtime.Serialization.Formatters.Soap</Source>
		</a2:InvalidCastException>
	</SOAP-ENV:Body>
</SOAP-ENV:Envelope>