Xceed.Wpf.AvalonDock.Themes.Office2007 (nuget): Xceed Toolkit Plus for WPF is the commercial edition of the popular Toolkit plus for WPF project, the number one collection of WPF controls for creating next-gen Windows apps.  You can try this package for free for 45 days, after which you will need to purchase a license key to continue using it.
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