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A Hotfix is a product update package with one or more updated product files that fix a specific product problem.


Please be aware this Hotfix has not gone through full Microsoft product regression testing nor has it been tested in combination with other Hotfixes.

Please carefully review the associated Hotfix KB article to verify the fix is the one needed and there are no known compatibility or installation issues. You may also want to contact a Microsoft Support Professional at

Issue Description

A hotfix rollup package is available for Windows Communication Foundation (WCF) in the Microsoft .NET Framework 3.0 Service Pack 2 (SP2) and in the Microsoft .NET Framework 4. The hotfix rollup package resolves issues that are described in the following Microsoft Knowledge Base (KB) articles:
2536618 FIX: Smsvchost.exe for the WCF service stops responding when you run a .NET Framework 4-based WCF service
2536401 FIX: Smsvchost.exe may crash when the Net.Tcp Port Sharing Service is used by a .NET Framework 4-based WCF service

Additional Information about the issue resolved by this Hotfix can be found in its Knowledge Base article at

Additional Hotfixes
Search the list of all other publicly available Visual Studio and .NET Framework Hotfixes at*
Last edited Apr 22 2011 at 6:05 PM  by DDHotfix, version 2
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