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FIX: Error message when you run an ASP.NET 2.0 Web application that is built on the .NET Framework 2.0: "The constructor to deserialize an object of type '<custom object>' was not found"

Consider the following scenario. You install the MS07-040 update. You run a Microsoft ASP.NET 2.0 Web application that is built on the Microsoft .NET Framework 2.0. In this scenario, you may receive an exception error message that resembles the following:
Exception object: 026e3ce4
Exception type: System.Runtime.Serialization.Serialization
ExceptionMessage: The constructor to deserialize an object of type '<custom object>' was not found.
InnerException: <none>
StackTrace (generated):
The stack trace that appears in the error message resembles the following:
    SP       IP       Function    00000000 00000001 System.Web.Hosting.ApplicationManager.RespondToPingIfNeeded()    05BFF168 660D7ACD System.Web.Hosting.HostingEnvironment.RespondToPingButNotTooOften()    05BFF1AC 660D796B System.Web.Hosting.HostingEnvironment.DecrementBusyCountInternal()    05BFF1BC 6600F404 System.Web.HttpRuntime.FinishRequest(System.Web.HttpWorkerRequest, System.Web.HttpContext, System.Exception)    05BFF204 6600FADB System.Web.HttpRuntime.OnHandlerCompletion(System.IAsyncResult)    05BFF234 65FF4FED System.Web.HttpAsyncResult.Complete(Boolean, System.Object, System.Exception, System.Web.RequestNotificationStatus)    05BFF24C 65FD3404 System.Web.HttpApplication+ApplicationStepManager.ResumeSteps(System.Exception)    05BFF29C 65FF0BDA System.Web.HttpApplication.ResumeStepsFromThreadPoolThread(System.Exception)    05BFF2A8 65FF2204 System.Web.HttpApplication+AsyncEventExecutionStep.ResumeStepsWithAssert(System.Exception)    05BFF2BC 6632DC55 System.Web.HttpApplication+AsyncEventExecutionStep.OnAsyncEventCompletion(System.IAsyncResult)    05BFF2EC 65FF4FED System.Web.HttpAsyncResult.Complete(Boolean, System.Object, System.Exception, System.Web.RequestNotificationStatus)    05BFF304 6612A7EA System.Web.SessionState.SessionStateModule.PollLockedSessionCallback(System.Object)

Additionally, you may receive a System.NullReferenceException exception from the System.Web.SessionState.SessionStateModule.PollLockedSessionCallback method. The following information is logged in the application event log:

Event Id : 5000:
EventType clr20r3, P1 aspnet_wp.exe, P2 2.0.50727.832, P3 461ef1db, P4 system.web, P5, P6 461ef1d2, P7 297c, P8 8d, P9 system.nullreferenceexception, P10 NIL.
Event id: 1000
aspnet_wp.exe (PID: 5240) stopped unexpectedly.

Object reference not set to an instance of an object

at System.Web.SessionState.SessionStateModule.PollLockedSessionCallback(Object state)
at System.Threading._TimerCallback.TimerCallback_Context(Object state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading._TimerCallback.PerformTimerCallback(Object state)

After you install the MS07-040 update, a global counter is implemented in an application domain. The application domain is separate from the current application domain. After the HttpWorkerRequest.EndOfRequest method is called, the times of the global counter implementation decrease. During the cross-application domain call, the current Thread.CurrentPrincipal property should be serialized. If the application uses a custom UserPrincipal class that is not serializable, the application cannot serialize the current Thread.CurrentPrincipal property. Therefore, the application throws the exception.

Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.


You must have the .NET Framework 2.0 installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
The .NET Framework 2.0, x86-based versions
File nameFile versionFile sizeDateTimePlatform
The .NET Framework 2.0, x64-based versions
File nameFile versionFile sizeDateTimePlatform
The .NET Framework 2.0, Itanium architecture versions
File nameFile versionFile sizeDateTimePlatform
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the MS07-040 update, click the following article number to view the article in the Microsoft Knowledge Base:
931212 MS07-040: Vulnerabilities in the .NET Framework could allow remote code execution
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
MS07-040, serialize, exception

Article ID: 942086 - Last Review: 10/08/2011 13:48:00 - Revision: 3.0

  • Microsoft .NET Framework 2.0
  • kbqfe kbexpertiseadvanced KB942086