Xamarin.forms: [Bug] [WPF] [XF 5.0] App crash on launch (resource not found 'themes/formsmasterdetailpage.xaml')

[Seuleuzeuh]

Description

I've update my new project with XF 5.0 preview 1 and when i try to launch the WPF application the app crash with the following error :
System.Xaml.XamlObjectWriterException: 'La propriété Set 'System.Windows.ResourceDictionary.Source' a levé une exception.'
Inner Exception
IOException: Impossible de trouver la ressource 'themes/formsmasterdetailpage.xaml'.

detailLog.txt

Steps to Reproduce

With the repro solution attached bellow, just start the WPF app.

Expected Behavior

Actual Behavior

Basic Information

• Version with issue: 5.0.0.1487-pre1
• Last known good version: 4.8
• IDE: VS19 Version 16.7.4
• Platform Target Frameworks:
  
  
  
  • WPF : 5.0.0.1487-pre1
  
  
• Nuget Packages:
  
  
  
  • Xamarin.Forms : version 5.0.0.1487-pre1
  
  
  • Xamarin.Forms.Platform.WPF : version 5.0.0.1487-pre1
  
  
• Affected Devices:

Screenshots

Reproduction Link

XFCrashRepro.zip

Workaround

[rmarinho]

@Seuleuzeuh can you send a small repo? did you clean rebuild and restart vs when updating the packagee?

Thanks

[mohaaron]

I can reproduce this and am using all the same software as listed above.

1. Create a Xamarin.Forms project.
2. Following these directions for adding the WPF app https://docs.microsoft.com/en-us/xamarin/xamarin-forms/platform/other/wpf
3. Bring nuget packages up to date with stable versions.
4. Running WPF app works with stable packages.
5. Now update packages to pre-release nuget versions.

[Seuleuzeuh]

@Seuleuzeuh can you send a small repo? did you clean rebuild and restart vs when updating the packagee?

Thanks

@rmarinho i've edited the issue to add a repro project. Yes i've clean/rebuild/restart a multiple time and also reboot 😄

[rmarinho]

Thanks we have a fix for it.