[Bug] Xamarin Page and View Templates break MAUI Apps

Description

When adding a ContentView or ContentPage to a .NET MAUI app using Visual Studio, it uses the Xamarin templates. Once you do this, the .NET MAUI app will no longer build.

I’m not sure if this is a MAUI issue or a Visual Studio 2022 issue - however, the build fails at the .NET CLI too.

Steps to Reproduce

1. Build a new .NET MAUI app
2. Using Visual Studio, add a ContentView or ContentPage
3. Try to build and run your .NET MAUI app

Expected Behavior

The app builds and runs

Actual Behavior

Multiple compiler warnings are thrown for The name 'InitializeComponent' does not exist in the current context

Basic Information

• Version with issue: .NET MAUI Preview 9
• Last known good version: NA
• IDE: Visual Studio 2022 17.0.0.0 Preview 7
• Platform Target Frameworks:
  • iOS:
  • Android:
  • UWP:
• Android Support Library Version:
• Nuget Packages: None
• Affected Devices: All

Screenshots

Reproduction Link

Workaround

With limited success, removing the views or pages added with the Xamarin templates, deleting the bin and obj folders (specifically obj) and cleaning/rebuilding the solution, you can run your app. This workaround does not work consistently though - probably because I have been unable to extricate all the of the Xamarin references.

[Eilon]

Eep! I think if the Xamarin.Forms item templates for ContentView and ContentPage show up then we need to make sure those get hidden from .NET MAUI apps. .NET MAUI does have its own ContentView and ContentPage item templates. For some reason in VS I see only the Xamarin.Forms versions but in the command line (dotnet new ...) I see the .NET MAUI ones.

[Xami3Shah]

whenever i create page with vs2022 then i have to remove the first line which contains

<?xml version="1.0" encoding="UTF-8"?>

and also the code for this page from csproj file. then it works fine.