Port C++/WinRT UWP component to C# projection for WinUI3.

[Sunilam]

Hi Team,

We were following the link(Link) technique to convert/port the C++/WinRT UWP component to make compatible to winui3. then we got the below error.
Error CS0234 The type or namespace name 'Xaml' does not exist in the namespace 'Windows.UI' (are you missing an assembly reference?) - when we are trying to create a nuget package.

We tried replacing Windows.UI.XAML to Microsoft.UI.XAML but we are still getting the error.

Could you please suggest us a best solution to convert/port the C++/WinRT UWP component to WInUI compatible.