Current behavior

1. Install https://marketplace.visualstudio.com/items?itemName=nventivecorp.uno-platform-addin
2. Create a new project using the Cross-Platform App (Uno Platform) app project template
3. Close the project (see https://developercommunity.visualstudio.com/content/problem/587976/xaml-intellisense-does-not-start-properly-on-proje.html)
4. Open the MainPage.xaml file in the MyApp.Shared\MainPage.xaml
5. In the project selector, select “MyProject.Droid”
6. Notice that the Page element is properly recognized by the editor, but the inner elements are not with the message The type Page does not support direct content, even if the type Page has ContentPropertyAttribute defined in its base classes.

Anything else we need to know?

Feedback from https://developercommunity.visualstudio.com/content/problem/587980/xaml-intellisense-does-not-use-contentpropertyattr.html and a recent video call with the Visual Studio team recommended that we look at the Xamarin.Forms project. Specifically ContentPropertyAttributes need to be moved out of Uno.UI.dll and into a design assembly. ie.

https://github.com/xamarin/Xamarin.Forms/tree/master/Xamarin.Forms.Core.Design

For which Platform:

• iOS
• Android
• WebAssembly
• Visual Studio for Windows
• Windows