Toolkit2/Toolkit.Foundation.Avalonia/Navigation/ContentControlNavigationHandler.cs

using Avalonia.Controls.Primitives;
using Mediator;

namespace Toolkit.Foundation.Avalonia
{
    public class ContentControlNavigationHandler : IRequestHandler<ContentControlNavigation, bool>
    {
        public async ValueTask<bool> Handle(ContentControlNavigation request, CancellationToken cancellationToken)
        {
            if (request.Template is TemplatedControl control)
            {
                control.DataContext = request.Content;
                request.Route.Content = control;
            }

            return await Task.FromResult(true);
        }
    }
}