This article describes hotfix rollup 3166737 for the Microsoft .NET Framework 4.5.2, 4.5.1, and 4.5. For more information about the issues that the hotfix rollup fixes, see the Issues that this hotfix rollup fixes section.
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Note To verify the hotfix update version, check the value of the Release keyword to determine the installed version. To be forward-compatible, you can check for a value that's greater than or equal to the value that's listed in the following table.
Hotfix rollup version
Value of the Release DWORD
Hotfix rollup 3166737 for the .NET Framework 4.5 and later versions
For more information about how to determine the .NET Framework versions, see How to: Determine which .NET Framework versions are installed.
To apply this hotfix, you must have the .NET Framework 4.5.2, 4.5.1, or 4.5 installed.
You have to restart the computer after you apply this hotfix if any affected files are being used. We recommend that you close all .NET Framework-based applications before you apply this hotfix.
Hotfix replacement information
This hotfix package doesn't replace a previously released hotfix package.
Issues that this hotfix rollup fixes
If you're using the classes in System.Workflow.* and you're also using workflow tracking and have enabled FIPS compliance on the computer where the workflows are running, you must create the following AppSetting in the application's configuration file (or web.config for Workflow Services):
<add key="microsoft:WorkflowRuntime:FIPSRequired" value="true"/>