The native Task Scheduler library is part of the OS and is only upgraded when you upgrade the OS (to Windows 10 for example). The .NET wrapper for that library, which is hosted on this project site, is used to access that native library using .NET languages and will work with any version of those libraries since Windows 98. If you need to update the wrapper, you can do that by downloading the assemblies from the Downloads tab or via NuGet.
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