Article ID: 2608565 - View products that this article applies to.
This article describes a hotfix for the ASP.NET browser definition files that are included in the Microsoft .NET Framework 3.5.1.
Note These ASP.NET browser definition files are part of the Microsoft .NET Framework 3.5.1 that is included in the release to manufacturer (RTM) version of Windows 7 and of Windows Server 2008 R2.
This hotfix introduces updated definitions in the browser definition file for Internet Explorer. The browser definition files are stored in one of the following folders, depending on the installed version of the Microsoft .NET Framework:
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)
Hotfix informationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
PrerequisitesTo apply this hotfix, you must have the .NET Framework 3.5.1 installed.
Restart informationAfter you apply this hotfix, you might have to restart the computer if any affected files are being used when you install this hotfix.
To avoid a restart of the computer, shut down all web server applications for ASP.NET websites before you apply this hotfix.
Replacement informationThis hotfix does not replace a previously-released hotfix.
File informationThe 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.
For all supported x86-based versions of the .NET Framework 3.5.1
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For all supported x64-based versions of the .NET Framework 3.5.1
Note Because of file dependencies, this hotfix might also contain other files.
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Common issue that occurs without this hotfixConsider the following scenario:
In this scenario, the postback fails, and you receive the following error message:
Script Error encountered", "'__doPostBack' is undefined
Note The webpage can start a postback in various ways. For example, a LinkButton control can start a postback.
The hotfix that applies to the ASP.NET files in the Microsoft .NET Framework 2.0 Service Pack 2 (SP2) and in the Microsoft .NET Framework 3.5 Service Pack 1 (SP1) is hotfix 2600100.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
2600100For more information about the browser definition file schema, visit the following Microsoft website:
(http://support.microsoft.com/kb/2600100/ )A hotfix is available for the ASP.NET browser definition files in the .NET Framework 2.0 SP2 and in the .NET Framework 3.5 SP1
General information about the browser definition file schemaFor more information about the Internet Explorer 10 user agent string, visit the following Microsoft website:
General information about the Internet Explorer 10 user agent stringFor more information about how to detect Internet Explorer more effectively, visit the following Microsoft website:
How to detect Internet Explorer more effectively