[BUG] Error referencing InitializeComponent in public App() constructor, but Build succeeded.

[AleksandarDevic]

Describe the Issue

When I create a simple MAUI project, in file MauiApp1\Platforms\Windows\App.xaml.cs
for method InitializeComponent I get a compiler error: 'App' does not contain a definition for 'InitializeComponent' and no accessible extension method 'InitializeComponent' accepting a first argument of type 'App' could be found (are you missing a using directive or an assembly reference?)CS1061.

But when I do dotnet build I get info Build Succeeded!

Steps To Reproduce

1. I created a simple MAUI project.

2. In file MauiApp1\Platforms\Windows\App.xaml.cs, for method InitializeComponent I get compiler error:
   'App' does not contain a definition for 'InitializeComponent' and no accessible extension method 'InitializeComponent' accepting a first argument of type 'App' could be found (are you missing a using directive or an assembly reference?)CS1061.

3. But when I do dotnet build I get info Build Succeeded!

Expected Behavior

The compiler should recognize the method InitializeComponent from MauiWinUIApplication class.

Environment Information

• OS: Windows 11
• VSCode: 1.87.2
• .NET MAUI v0.9.7, C# v2.22.5, C# Dev Kit v1.4.29
  | VS Bug 2032244

[mauroa]

Hi @AleksandarDevic. In the provided screenshot, I don't see the solution explorer at the left. I can only see your MAUI project folder opened as a workspace.
Do you have the C#, C# DevKit and MAUI DevKit extensions installed?
If so, could you please share the content of the C#, C# DevKit and .NET MAUI output panes?
Thanks

[AleksandarDevic]

Yes, I have all the extensions and their versions you can see in the first message.
Screenshoots:

1. Output .NET MAUI
   
   2.Output C# Dev Kit
   
   3.Output C#
   
   4.Problems:
   

[github-actions]

The needs-more-info label has been removed since the original bug filer has responded since the label was originally set.

[fushihara]

I am experiencing the same event.
dotnet new wpf.
I just opened a new project created with this command and now I get the same error.
It does not affect the build, but it is not very good mentally.

windows 10, dotnet 8.0.204.
Non wpf cli projects are fine.
Visual studio not vscode is fine.