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.NET MAUI Community Toolkit v10.0: How to Fix BindingContext Issues with Behaviors

Yesterday marked the official release of the highly anticipated .NET MAUI Toolkit (CommunityToolkit.Maui) package v10.0, introducing native support for .NET 9.

Though it is the extended arm of .NET MAUI app development, for newcomers, this officially supported toolkit offers a comprehensive collection of essential components—such as Alerts, Behaviors, Converters, Extensions, Layouts, and Views—that are crucial for developing real-world apps.

This new release has some breaking changes, with the most notable being aligning with the design change introduced in .NET MAUI 9, where Behaviors no longer automatically inherit the BindingContext of their parent (a major shift from the original Xamarin.Forms design).