Release Build Error with NavigationView

Describe the bug When I create a project with a NavigationView and start the package in den the debug configuration everything works fine, but if I start it with the release configuration I get a Cannot find a Resource with the Name/Key TabViewButtonBackground error message.

Steps to reproduce the bug

Steps to reproduce the behavior:

1. Create a blank WinUi desktop project with package
2. Delete the button from the xaml and cs
3. Add a simple NavigationView to the xaml
4. Build and start the app in release configuration

Expected behavior App works the same as in debug configuration

Version Info

• Nuget WinUI: 3.0.0-preview2.200713.0
• .net SDK: 5.0.100-preview.5.20279.10 (x86 and x64)
• VS: 16.7.0 Preview 4.0 (4.8.04084)
• Windows: Win10 19041

NuGet package version: [Microsoft.WinUI 3.0.0-preview2.200713.0]

Windows 10 version	Saw the problem?
Insider Build (xxxxx)	not tested
May 2020 Update (19041)	Yes
November 2019 Update (18363)	not tested
May 2019 Update (18362)	not tested
October 2018 Update (17763)	not tested
April 2018 Update (17134)	not tested
Fall Creators Update (16299)	not tested
Creators Update (15063)	not tested

Device form factor	Saw the problem?
Desktop	Yes
Xbox	not tested
Surface Hub	not tested
IoT	not tested

Additional context I found the following Issue 1295 which sounded similar enough but the fix did not work. A simple Test project with all the described reproduce steps App1.zip

[stevenbrix]

@icnocop this sounds somewhat familiar, can you try adding this to your project file:

<PropertyGroup>
   <DisableEmbeddedXbf>true</DisableEmbeddedXbf>
</PropertyGroup>

[icnocop]

Thank you, @stevenbrix!

That worked! 🎉