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Continue to ChatExtensionising Wpf (or Chris' fun with Extension methods and Wpf) https://xclave.co.uk/2008/05/06/extensionising-wpf-or-chris-fun-with-extension-methods-and-wpf/
Extensionising Wpf (or Chris' fun with Extension methods and Wpf) https://xclave.co.uk/2008/05/06/extensionising-wpf-or-chris-fun-with-extension-methods-and-wpf/