FIX: A Web service or a Web service client may fail with a stack overflow when you call the Web service method in the .NET Framework 1.1 or in the .NET Framework 2.0

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In the Microsoft .NET Framework 1.1 or in the .NET Framework 2.0, a Web service or a Web service client may fail with a stack overflow when you call the Web service method.

Note The stack overflow may occur on the server during automatic Web Services Description Language (WSDL) generation. For example, the problem may occur when you type the URL of a Web service together with the "?wsdl" parameter in a Web browser, or when you add a Web reference to a Visual Studio project.
This problem occurs because the XmlReflectionImporter class uses a recursion algorithm to reflect a WebService class. This problem occurs if the Web service has a schema that has a deep level of type nesting or if the process has a limited stack size.

For example, a stack overflow may occur if the following conditions are true:
  • The Web service schema has 500 nested types.
  • The hosting process is W3wp.exe and has a stack size of 256 KB.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it 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 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product 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 1.1 Service Pack 1 or the .NET Framework 2.0 installed before you apply this hotfix.

Restart requirement

You do not have to restart your 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 1.1 with Service Pack 1
File nameFile versionFile sizeDateTime
The .NET Framework 2.0
File nameFile versionFile sizeDateTime
The .NET Framework 2.0 with Service Pack 1
File nameFile versionFile sizeDateTime
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
After you apply this hotfix, you must add XML code to the following files:
  • The Web.config file for the Web Service application
  • The Web.config file or the App.config file for the client application
You must add the following XML code.
<system.diagnostics>	<switches>		<add name="XmlSerialization.NonRecursiveTypeLoading" value="1"/>	</switches></system.diagnostics>
For more information, 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
stack overflow nested types

Article ID: 923419 - Last Review: 01/17/2015 15:44:34 - Revision: 4.0

  • Microsoft .NET Framework 1.1
  • Microsoft .NET Framework 2.0
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