In the Microsoft .NET Framework 3.0, a memory leak occurs in a Windows Communication Framework (WCF) channel when you use the NetMsmq transport to send many messages.

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This issue occurs when WCF channels are not disposed correctly.

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Software update information

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, Microsoft recommends that you wait for the next Microsoft .NET Framework 1.1 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 phone 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.

Prerequisites

You must have the .NET Framework 3.0 installed to apply this hotfix.

Restart requirement

You do not have to restart your computer after you apply this software update.

Software update replacement information

This software update does not replace any other software updates.

File information

The English version of this software update 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.

.NET Framework 3.0, x86

File name	File size	Date	Time	Path
System.servicemodel.dll	5,619,712	25-Apr-2007	23:49

.NET Framework 3.0, x64

File name	File size	Date	Time	Path
System.servicemodel.dll	5,619,712	25-Apr-2007	23:41
System.servicemodel.dll	5,619,712	25-Apr-2007	23:49

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

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