Develop Reference

Better way to serialize with a timeout in c#.Net

My use case:
In a single threaded application, I need to serialize arbitrary classes for logging purposes.
The arbitrary classes are predominantly translated in an automated way from a massive VB6 application into .NET.
If serialized without a timeout, the serialization method will loop until it runs out of memory.
This is what I have currently:
internal class Serializer
{
private readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
public volatile string result = null;
public volatile Func<string> toExecute = null;
public Thread thread;
public ManualResetEventSlim messageToSender = new ManualResetEventSlim(false);
public ManualResetEventSlim messageToReceiver = new ManualResetEventSlim(false);
public Serializer()
{
thread = new Thread(new ThreadStart(run));
thread.Start();
}
~Serializer()
{
try
{
if (messageToSender != null) messageToSender.Dispose();
}
catch { };
try
{
if (messageToReceiver != null) messageToReceiver.Dispose();
}
catch { };
}
public volatile bool ending = false;
public void run()
{
while (!ending)
{
try
{
if (toExecute != null)
{
result = toExecute();
}
messageToReceiver.Reset();
messageToSender.Set();
messageToReceiver.Wait();
}
catch (ThreadInterruptedException)
{
log.Warn("Serialization interrupted");
break;
}
catch (ThreadAbortException)
{
Thread.ResetAbort();
result = null;
}
catch (Exception ex)
{
log.Error("Error in Serialization", ex);
Console.WriteLine(ex);
break;
}
}
}
}
public class LocalStructuredLogging
{
private static volatile Serializer _serializer;
private static Serializer serializer
{
get
{
if (_serializer == null)
{
_serializer = new Serializer();
}
return _serializer;
}
}
public void LogStucturedEnd()
{
try
{
if (serializer != null)
{
serializer.ending = true;
serializer.thread.Interrupt();
}
}
catch { }
}
internal ConcurrentDictionary<long, bool> disallowedToSerialize = new ConcurrentDictionary<long, bool>();
public string TrySerialize<T>(T payload, [CallerLineNumber] int line = 0)
{
long hashEl = typeof(T).Name.GetHashCode() * line;
bool dummy;
unchecked
{
if (disallowedToSerialize.TryGetValue(hashEl, out dummy))
{
return "°,°";
}
}
serializer.toExecute = () =>
{
try
{
return Newtonsoft.Json.JsonConvert.SerializeObject(payload, new Newtonsoft.Json.JsonSerializerSettings() { ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore });
}
catch (Exception)
{
disallowedToSerialize.TryAdd(hashEl, false);
return "°°°";
}
};
try
{
serializer.messageToSender.Reset();
serializer.messageToReceiver.Set();
if (serializer.messageToSender.Wait(6000))
{
return Interlocked.Exchange(ref serializer.result, null);
}
serializer.toExecute = null;
serializer.thread.Abort();
serializer.messageToSender.Wait(2000);
disallowedToSerialize.TryAdd(hashEl, false);
return "°§°";
}
catch (Exception)
{
disallowedToSerialize.TryAdd(hashEl, false);
return "°-°";
}
}
}
The code is called as in the following (test is an arbitrary class instance):
var logger = new LocalStructuredLogging();
var rr5 = logger.TrySerialize(test);
Although it seems to do the job, there are some issues with it:
it has a dependency on Thread.Abort
it is time dependent, so it will thus produce varied results on a loaded system
every class instance is treated like every other class instance - no tweaking
...
So, are there any better solutions available ?

Based upon dbc's excellent answer, I managed to create a better timed serializer.
It resolves all 3 issues mentioned above:
public class TimedJsonTextWriter : JsonTextWriter
{
public int? MaxDepth { get; set; }
public TimeSpan? MaxTimeUsed { get; set; }
public int MaxObservedDepth { get; private set; }
private DateTime start = DateTime.Now;
public TimedJsonTextWriter(TextWriter writer, JsonSerializerSettings settings, TimeSpan? maxTimeUsed)
: base(writer)
{
this.MaxDepth = (settings == null ? null : settings.MaxDepth);
this.MaxObservedDepth = 0;
this.MaxTimeUsed = maxTimeUsed;
}
public TimedJsonTextWriter(TextWriter writer, TimeSpan? maxTimeUsed, int? maxDepth = null)
: base(writer)
{
this.MaxDepth = maxDepth;
this.MaxTimeUsed = maxTimeUsed;
}
public override void WriteStartArray()
{
base.WriteStartArray();
CheckDepth();
}
public override void WriteStartConstructor(string name)
{
base.WriteStartConstructor(name);
CheckDepth();
}
public override void WriteStartObject()
{
base.WriteStartObject();
CheckDepth();
}
uint checkDepthCounter = 0;
private void CheckDepth()
{
MaxObservedDepth = Math.Max(MaxObservedDepth, Top);
if (Top > MaxDepth)
throw new JsonSerializationException($"Depth {Top} Exceeds MaxDepth {MaxDepth} at path \"{Path}\"");
unchecked
{
if ((++checkDepthCounter & 0x3ff) == 0 && DateTime.Now - start > MaxTimeUsed)
throw new JsonSerializationException($"Time Usage Exceeded at path \"{Path}\"");
}
}
}
public class LocalStructuredLogging
{
public void LogStucturedEnd()
{
}
internal HashSet<long> disallowedToSerialize = new HashSet<long>();
public string TrySerialize<T>(T payload, int maxDepth = 100, int secondsToTimeout = 2, [CallerLineNumber] int line = 0)
{
long hashEl = typeof(T).Name.GetHashCode() * line;
if (disallowedToSerialize.Contains(hashEl))
{
return "°,°";
}
try
{
var settings = new JsonSerializerSettings { MaxDepth = maxDepth, ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore };
using (var writer = new StringWriter())
{
using (var jsonWriter = new TimedJsonTextWriter(writer, settings, new TimeSpan(0, 0, secondsToTimeout)))
{
JsonSerializer.Create(settings).Serialize(jsonWriter, payload);
// Log the MaxObservedDepth here, if you want to.
}
return writer.ToString();
}
}
catch (Exception)
{
disallowedToSerialize.Add(hashEl);
return "°-°";
}
}
}
The only issue remaining are the Hash collisions, which are easy to solve (e.g. by using the source file name as well or use another type of Collection).

The correct way to run an action timed would be to do something like the following. I would recommend taking a second look at how serialization should work as well :).
/// <summary>
/// Run an action timed.
/// </summary>
/// <param name="action">Action to execute timed.</param>
/// <param name="secondsTimout">Seconds before Task should cancel.</param>
/// <returns></returns>
public static async Task RunTimeout(Action action, int secondsTimout) {
var tokenSource = new CancellationTokenSource();
tokenSource.CancelAfter(TimeSpan.FromSeconds(secondsTimout));
await Task.Run(action, tokenSource.Token);
}
You may also want to return a variable upon the completion of your timed task. That can be done like so...
public static async Task<T> RunTimeout<T>(Func<T> action, int secondsTimout) {
var tokenSource = new CancellationTokenSource();
tokenSource.CancelAfter(TimeSpan.FromSeconds(secondsTimout));
var result = await Task.Run(action, tokenSource.Token);
return result;
}

C# - XML Deserialization of properties

I cannot find a reason why properties without getters aren't parsing properly, let me write you an example:
For XML in format
<request>
<job
mode="modefirst"
/>
<request>
I am trying to deserialize it to the POCO with a property:
private ESomeEnum emode;
[XmlAttribute(AttributeName = "mode")]
public string Mode
{
set { ESomeEnum.TryParse( blah blah );
}
emode is being set for default value in class constructor, while deserializing (System.Xml.Serialization without custom classes, just trying to be minimalistic in here) the xml from above, the setter is never being called, but when property 'Mode' contains a getter
get { return this.emode.ToString(); }
setter is actually being hit and proper value set during deserialization.
Why this situation occurs? Is there any reason behind it?

The XmlSerializer processes properties only, which have public get-set accessors. But you can customize anything by implementing IXmlSerializable:
public class MyXmlSerializableClass : IXmlSerializable
{
private ESomeEnum emode = ESomeEnum.modefirst;
public string Mode
{
set { emode = ESomeEnum.Parse(value); }
}
public int ReadWriteProperty { get; set; }
public int SemiReadOnlyProperty { get; private set; }
private int backingFieldOfRealReadOnlyProperty;
public int RealReadOnlyProperty
{
get { return backingFieldOfRealReadOnlyProperty; }
}
#region IXmlSerializable Members
public System.Xml.Schema.XmlSchema GetSchema()
{
throw new NotImplementedException();
}
public void ReadXml(XmlReader reader)
{
if (reader.Settings != null && !reader.Settings.IgnoreWhitespace)
{
reader = XmlReader.Create(reader, new XmlReaderSettings { IgnoreWhitespace = true });
reader.Read();
}
reader.ReadStartElement();
Mode = reader.ReadElementContentAsString("Mode", String.Empty);
ReadWriteProperty = reader.ReadElementContentAsInt("ReadWriteProperty", String.Empty);
SemiReadOnlyProperty = reader.ReadElementContentAsInt("ReadOnlyAutoProperty", String.Empty);
backingFieldOfRealReadOnlyProperty = reader.ReadElementContentAsInt("ReadOnlyProperty", String.Empty);
}
public void WriteXml(XmlWriter writer)
{
writer.WriteElementString("Mode", emode.ToString());
writer.WriteElementString("ReadWriteProperty", ReadWriteProperty.ToString(CultureInfo.InvariantCulture));
writer.WriteElementString("ReadOnlyAutoProperty", SemiReadOnlyProperty.ToString(CultureInfo.InvariantCulture));
writer.WriteElementString("ReadOnlyProperty", RealReadOnlyProperty.ToString(CultureInfo.InvariantCulture));
}
#endregion
internal MyXmlSerializableClass()
{/*needed for deserialization*/
}
}

All my IsDirty flags are set to true after reading in a XML file using XmlSerializer

I have a problem with implementing an IsDirty mechanism with my XmlSerializer system.
This is how my serialization is called:
public OCLMEditorModel()
{
DeSerialize();
}
public void Serialize()
{
XmlSerializer x = new XmlSerializer(_ModelData.GetType());
using (StreamWriter writer = new StreamWriter(_strPathModelDataXml))
{
x.Serialize(writer, _ModelData);
}
}
public void DeSerialize()
{
_ModelData = new OCLMModelData();
XmlSerializer x = new XmlSerializer(_ModelData.GetType());
using (StreamReader reader = new StreamReader(_strPathModelDataXml))
{
_ModelData = (OCLMModelData)x.Deserialize(reader);
}
}
It reads and saves perfectly, no issues there. But it is the IsDirty flag I have issues with. Directly after the DeSerialize call ...
Ass the IsDirty are set to true. Even though all we have done is read it in from the computer. Example properties:
public class MaterialItem
{
[XmlAttribute]
public string Setting
{
get { return _Setting; }
set
{
_Setting = value;
MarkDirty();
}
}
private string _Setting;
[XmlText]
public string Material
{
get { return _Material; }
set
{
_Material = value;
MarkDirty();
}
}
private string _Material;
[XmlIgnore]
public bool IsDirty { get { return _isDirty; } }
private bool _isDirty;
public void MarkClean()
{
_isDirty = false;
}
protected void MarkDirty()
{
_isDirty = true;
}
public MaterialItem()
{
MarkClean();
}
}
Ideally, the flag should be false when we have just read it using XMLSerializer.
What am I doing wrong?
Thank you.

XmlSerializer doesn't work in any mysterious way.
It uses reflection, yes, but only to get the properties it can serialize/deserialize. Then it uses those properties to get/set the required values.
So during the deserialization those setters will be called, thus calling the MarkDirty method, thus marking your entities dirty.
There isn't anything you can change in XmlSerializer, but you can change your deserialization method, so it sets the entity clean just after deserializing it:
public void DeSerialize()
{
_ModelData = new OCLMModelData();
XmlSerializer x = new XmlSerializer(_ModelData.GetType());
using (StreamReader reader = new StreamReader(_strPathModelDataXml))
{
_ModelData = (OCLMModelData)x.Deserialize(reader);
}
_ModelData.MarkClean();
}

Using SharpSvn to retrieve log revisions got Disk issue

I'm workin on a wcf service to get some info of svn log.
My service method:
public List<SvnLogInfo> ViewLog(Executable ejecutable) {
Configuration config = m_context.Configuration.SingleOrDefault();
if (config != null) {
SvnClient svnClient = new SvnClient();
SvnRevisionRange svnRevisionRange = new SvnRevisionRange(ejecutable.SvnRevisionFrom, ejecutable.SvnRevisionTo);
SvnLogArgs args = new SvnLogArgs(svnRevisionRange);
Collection<SvnLogEventArgs> logCollection;
svnClient.GetLog(config.RepositoryPath, args, out logCollection);
List<SvnLogInfo> logInfo = new List<SvnLogInfo>();
foreach (SvnLogEventArgs log in logCollection) {
logInfo.Add((SvnLogInfo)log);
}
return logInfo;
}
return null;
}
[Serializable]
public class SvnLogInfo {
public SvnLogInfo() {
}
private string m_message;
public string Mensaje {
get { return m_message; }
set { m_message = value; }
}
private string m_author;
public string Autor {
get { return m_author; }
set { m_author = value; }
}
public static explicit operator SvnLogInfo(SvnLogEventArgs e) {
SvnLogInfo info = new SvnLogInfo();
info.Mensaje = e.LogMessage;
info.Autor = e.Author;
return info;
}
}
It works, but when excetuing this line:
svnClient.GetLog(config.RepositoryPath, args, out logCollection);
Throws me this error message:
There is no disk in drive G.
As I mention, I'm using SharpSvn library. Is there a way to solve this issues?. By the way, the variable config.RepositoryPath has this value "C:\Users\carlos.vega.CONTAPERU\Desktop\Solucion ContaNet v3 Espero Funcione"

How do I get access to SOAP response

(If anything here needs clarification/ more detail please let me know.)
I have an application (C#, 2.* framework) that interfaces with a third-party webservice using SOAP. I used thinktecture's WSCF add-in against a supplied WSDL to create the client-side implementation. For reasons beyond my control the SOAP message exchange uses WSE2.0 for security (the thinctecture implementation had to be modified to include the WSE2.0 reference). In addition to the 'normal' data package I attach a stored X509 cert and a binary security token from a previous call to a different web service. We are using SSL encryption of some sort - I don't know the details.
All the necessary serialization/deserialization is contained in the web service client - meaning when control is returned to me after calling the client the entire XML string contained in the SOAP response is not available to me - just the deserialized components. Don't get me wrong - I think that's good because it means I don't have to do it myself.
However, in order for me to have something worth storing/archiving I am having to re-serialize the data at the root element. This seems like a waste of resources since my result was in the SOAP response.
Now for my question:
How can I get access to a 'clear' version of the SOAP response so that I don't have to re-serialize everything for storage/archiving?
Edit- My application is a 'formless' windows app running as a network service - triggered by a WebsphereMQ client trigger monitor. I don't think ASP.NET solutions will apply.
Edit - Since the consensus so far is that it doesn't matter whether my app is ASP.NET or not then I will give CodeMelt's (and by extension Chris's) solution a shot.

You can utilize SoapExtension from existing WSE2.0 framework to intercept the responses from the server.
public class MyClientSOAPExtension : SoapExtension
{
Stream oldStream;
Stream newStream;
// Save the Stream representing the SOAP request or SOAP response into
// a local memory buffer.
public override Stream ChainStream( Stream stream )
{
oldStream = stream;
newStream = new MemoryStream();
return newStream;
}
public override void ProcessMessage(SoapMessage message)
{
switch (message.Stage)
{
case SoapMessageStage.BeforeDeserialize:
// before the XML deserialized into object.
break;
case SoapMessageStage.AfterDeserialize:
break;
case SoapMessageStage.BeforeSerialize:
break;
case SoapMessageStage.AfterSerialize:
break;
default:
throw new Exception("Invalid stage...");
}
}
}
At stage of SoapMessageStage.BeforeDeserialize,
You can read the expected data you want from oldstream (e.g. use XmlReader).
Then store the expected data somewhere for yourself to use and also you need
forward the old stream data to the newstream for web service later stage to use the data, e.g. deserialize XML into objects.
The sample of logging all the traffic for the web service from MSDN

Here is an example you can setup using Visual studio web reference to http://footballpool.dataaccess.eu/data/info.wso?WSDL
Basically, you must insert in the webservice call chain a XmlReader spyer that will reconstruct the raw XML.
I believe this way is somehow simpler that using SoapExtensions.
Solution solution was inspired by http://orbinary.com/blog/2010/01/getting-the-raw-soap-xml-sent-via-soaphttpclientprotocol/
using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Reflection;
using System.Xml;
namespace ConsoleApplication1 {
public class XmlReaderSpy : XmlReader {
XmlReader _me;
public XmlReaderSpy(XmlReader parent) {
_me = parent;
}
/// <summary>
/// Extracted XML.
/// </summary>
public string Xml;
#region Abstract method that must be implemented
public override XmlNodeType NodeType {
get {
return _me.NodeType;
}
}
public override string LocalName {
get {
return _me.LocalName;
}
}
public override string NamespaceURI {
get {
return _me.NamespaceURI;
}
}
public override string Prefix {
get {
return _me.Prefix;
}
}
public override bool HasValue {
get { return _me.HasValue; }
}
public override string Value {
get { return _me.Value; }
}
public override int Depth {
get { return _me.Depth; }
}
public override string BaseURI {
get { return _me.BaseURI; }
}
public override bool IsEmptyElement {
get { return _me.IsEmptyElement; }
}
public override int AttributeCount {
get { return _me.AttributeCount; }
}
public override string GetAttribute(int i) {
return _me.GetAttribute(i);
}
public override string GetAttribute(string name) {
return _me.GetAttribute(name);
}
public override string GetAttribute(string name, string namespaceURI) {
return _me.GetAttribute(name, namespaceURI);
}
public override void MoveToAttribute(int i) {
_me.MoveToAttribute(i);
}
public override bool MoveToAttribute(string name) {
return _me.MoveToAttribute(name);
}
public override bool MoveToAttribute(string name, string ns) {
return _me.MoveToAttribute(name, ns);
}
public override bool MoveToFirstAttribute() {
return _me.MoveToFirstAttribute();
}
public override bool MoveToNextAttribute() {
return _me.MoveToNextAttribute();
}
public override bool MoveToElement() {
return _me.MoveToElement();
}
public override bool ReadAttributeValue() {
return _me.ReadAttributeValue();
}
public override bool Read() {
bool res = _me.Read();
Xml += StringView();
return res;
}
public override bool EOF {
get { return _me.EOF; }
}
public override void Close() {
_me.Close();
}
public override ReadState ReadState {
get { return _me.ReadState; }
}
public override XmlNameTable NameTable {
get { return _me.NameTable; }
}
public override string LookupNamespace(string prefix) {
return _me.LookupNamespace(prefix);
}
public override void ResolveEntity() {
_me.ResolveEntity();
}
#endregion
protected string StringView() {
string result = "";
if (_me.NodeType == XmlNodeType.Element) {
result = "<" + _me.Name;
if (_me.HasAttributes) {
_me.MoveToFirstAttribute();
do {
result += " " + _me.Name + "=\"" + _me.Value + "\"";
} while (_me.MoveToNextAttribute());
//Let's put cursor back to Element to avoid messing up reader state.
_me.MoveToElement();
}
if (_me.IsEmptyElement) {
result += "/";
}
result += ">";
}
if (_me.NodeType == XmlNodeType.EndElement) {
result = "</" + _me.Name + ">";
}
if (_me.NodeType == XmlNodeType.Text || _me.NodeType == XmlNodeType.Whitespace) {
result = _me.Value;
}
if (_me.NodeType == XmlNodeType.XmlDeclaration) {
result = "<?" + _me.Name + " " + _me.Value + "?>";
}
return result;
}
}
public class MyInfo : ConsoleApplication1.eu.dataaccess.footballpool.Info {
protected XmlReaderSpy _xmlReaderSpy;
public string Xml {
get {
if (_xmlReaderSpy != null) {
return _xmlReaderSpy.Xml;
}
else {
return "";
}
}
}
protected override XmlReader GetReaderForMessage(System.Web.Services.Protocols.SoapClientMessage message, int bufferSize) {
XmlReader rdr = base.GetReaderForMessage(message, bufferSize);
_xmlReaderSpy = new XmlReaderSpy((XmlReader)rdr);
return _xmlReaderSpy;
}
}
class Program {
static void Main(string[] args) {
MyInfo info = new MyInfo();
string[] rest = info.Cities();
System.Console.WriteLine("RAW Soap XML response :\n"+info.Xml);
System.Console.ReadLine();
}
}
}

Old thread, but in case others are looking to do this today: these ideas of leveraging SoapExtension or creating 'spy' classes are great, but don't work in .NET Core.
#mting923's suggestion to use IClientMessageInspector approach works in .NET Core 3.1; see here: Get SOAP Message before sending it to the WebService in .NET.
A generated SOAP proxy class is still just a WCF client under the hood, and so the IClientMessageInspector approach works a treat, even for an .NET Core Azure Function calling an older SOAP web service. The following works for me in a .NET Core 3.1 Azure Function:
public class SoapMessageInspector : IClientMessageInspector
{
public string LastRequestXml { get; private set; }
public string LastResponseXml { get; private set; }
public object BeforeSendRequest(ref Message request, IClientChannel channel)
{
LastRequestXml = request.ToString();
return request;
}
public void AfterReceiveReply(ref Message reply, object correlationState)
{
LastResponseXml = reply.ToString();
}
}
public class SoapInspectorBehavior : IEndpointBehavior
{
private readonly SoapMessageInspector inspector_ = new SoapMessageInspector();
public string LastRequestXml => inspector_.LastRequestXml;
public string LastResponseXml => inspector_.LastResponseXml;
public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
{
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
}
public void Validate(ServiceEndpoint endpoint)
{
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
clientRuntime.ClientMessageInspectors.Add(inspector_);
}
}
And then it can be set up like this:
var client = new ServiceClient();
var soapInspector = new SoapInspectorBehavior();
client.Endpoint.EndpointBehaviors.Add(soapInspector);
After invoking a web service call on the client proxy, soapInspector.LastRequestXml and soapInspector.LastResponseXml will contain the raw SOAP request and response (as strings).

Inspired by jfburdet, I wanted to see if it was possible to directly intercept at stream/byte level rather than reconstructing XML. And it is! See code below:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web.Services.Protocols;
using System.Xml;
using Test.MyWebReference;
namespace Test {
/// <summary>
/// Adds the ability to retrieve the SOAP request/response.
/// </summary>
public class ServiceSpy : OriginalService {
private StreamSpy writerStreamSpy;
private XmlTextWriter xmlWriter;
private StreamSpy readerStreamSpy;
private XmlTextReader xmlReader;
public MemoryStream WriterStream {
get { return writerStreamSpy == null ? null : writerStreamSpy.ClonedStream; }
}
public XmlTextWriter XmlWriter {
get { return xmlWriter; }
}
public MemoryStream ReaderStream {
get { return readerStreamSpy == null ? null : readerStreamSpy.ClonedStream; }
}
public XmlTextReader XmlReader {
get { return xmlReader; }
}
protected override void Dispose(bool disposing) {
base.Dispose(disposing);
DisposeWriterStreamSpy();
DisposeReaderStreamSpy();
}
protected override XmlWriter GetWriterForMessage(SoapClientMessage message, int bufferSize) {
// Dispose previous writer stream spy.
DisposeWriterStreamSpy();
writerStreamSpy = new StreamSpy(message.Stream);
// XML should always support UTF8.
xmlWriter = new XmlTextWriter(writerStreamSpy, Encoding.UTF8);
return xmlWriter;
}
protected override XmlReader GetReaderForMessage(SoapClientMessage message, int bufferSize) {
// Dispose previous reader stream spy.
DisposeReaderStreamSpy();
readerStreamSpy = new StreamSpy(message.Stream);
xmlReader = new XmlTextReader(readerStreamSpy);
return xmlReader;
}
private void DisposeWriterStreamSpy() {
if (writerStreamSpy != null) {
writerStreamSpy.Dispose();
writerStreamSpy.ClonedStream.Dispose();
writerStreamSpy = null;
}
}
private void DisposeReaderStreamSpy() {
if (readerStreamSpy != null) {
readerStreamSpy.Dispose();
readerStreamSpy.ClonedStream.Dispose();
readerStreamSpy = null;
}
}
/// <summary>
/// Wrapper class to clone read/write bytes.
/// </summary>
public class StreamSpy : Stream {
private Stream wrappedStream;
private long startPosition;
private MemoryStream clonedStream = new MemoryStream();
public StreamSpy(Stream wrappedStream) {
this.wrappedStream = wrappedStream;
startPosition = wrappedStream.Position;
}
public MemoryStream ClonedStream {
get { return clonedStream; }
}
public override bool CanRead {
get { return wrappedStream.CanRead; }
}
public override bool CanSeek {
get { return wrappedStream.CanSeek; }
}
public override bool CanWrite {
get { return wrappedStream.CanWrite; }
}
public override void Flush() {
wrappedStream.Flush();
}
public override long Length {
get { return wrappedStream.Length; }
}
public override long Position {
get { return wrappedStream.Position; }
set { wrappedStream.Position = value; }
}
public override int Read(byte[] buffer, int offset, int count) {
long relativeOffset = wrappedStream.Position - startPosition;
int result = wrappedStream.Read(buffer, offset, count);
if (clonedStream.Position != relativeOffset) {
clonedStream.Position = relativeOffset;
}
clonedStream.Write(buffer, offset, result);
return result;
}
public override long Seek(long offset, SeekOrigin origin) {
return wrappedStream.Seek(offset, origin);
}
public override void SetLength(long value) {
wrappedStream.SetLength(value);
}
public override void Write(byte[] buffer, int offset, int count) {
long relativeOffset = wrappedStream.Position - startPosition;
wrappedStream.Write(buffer, offset, count);
if (clonedStream.Position != relativeOffset) {
clonedStream.Position = relativeOffset;
}
clonedStream.Write(buffer, offset, count);
}
public override void Close() {
wrappedStream.Close();
base.Close();
}
protected override void Dispose(bool disposing) {
if (wrappedStream != null) {
wrappedStream.Dispose();
wrappedStream = null;
}
base.Dispose(disposing);
}
}
}
}

The MSDN Library includes example code for obtaining the XML of both the request and the response that you can use to archive it. Obviously you'll have to make some changes since the example stores data in a text file, but it isn't too complicated.