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[.NET10][MauiEmbedding]Build fails with errors #21566

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[.NET10][MauiEmbedding]Build fails with errors#21566
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kazo0morning4coffe-dev
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difficulty/medium 🤔Categorizes an issue for which the difficulty level is reachable with a good understanding of WinUIproject/core-tools 🛠️Categorizes an issue or PR as relevant to core and tools
@jhanvi03

Description

@jhanvi03
jhanvi03
opened on Oct 7, 2025

Current behavior 🐛

Creating project with .NET 10 as framework and Maui Embedding as feature and building solution for any TFM throws error. Uno-check and uno-check --pre-major is green.

Errors: 

Warning As Error: Detected package downgrade: Xamarin.AndroidX.Collection from 1.5.0.3 to 1.5.0.2. Reference the package directly from the project to select a different version. 
 Net10Maui -> Xamarin.Google.Android.Material 1.12.0.4 -> Xamarin.AndroidX.Core 1.16.0.3 -> Xamarin.AndroidX.Collection (>= 1.5.0.3) 
 Net10Maui -> Xamarin.AndroidX.Collection (>= 1.5.0.2)
Warning As Error: Detected package downgrade: Xamarin.AndroidX.Activity from 1.10.1.3 to 1.10.1.2. Reference the package directly from the project to select a different version. 
 Net10Maui -> Xamarin.Google.Android.Material 1.12.0.4 -> Xamarin.AndroidX.Fragment 1.8.8.1 -> Xamarin.AndroidX.Activity (>= 1.10.1.3) 
 Net10Maui -> Xamarin.AndroidX.Activity (>= 1.10.1.2)
Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.Common from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
 Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.Common (>= 2.9.2.1) 
 Net10Maui -> Xamarin.AndroidX.Navigation.Common (>= 2.8.9.2)
Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.Fragment from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
 Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.Fragment (>= 2.9.2.1) 
 Net10Maui -> Xamarin.AndroidX.Navigation.Fragment (>= 2.8.9.2)
Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.Runtime from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
 Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.Runtime (>= 2.9.2.1) 
 Net10Maui -> Xamarin.AndroidX.Navigation.Runtime (>= 2.8.9.2)
Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.UI from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
 Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.UI (>= 2.9.2.1) 
 Net10Maui -> Xamarin.AndroidX.Navigation.UI (>= 2.8.9.2)
Warning As Error: Detected package downgrade: Xamarin.AndroidX.SwipeRefreshLayout from 1.1.0.29 to 1.1.0.28. Reference the package directly from the project to select a different version. 
 Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.SwipeRefreshLayout (>= 1.1.0.29) 
 Net10Maui -> Xamarin.AndroidX.SwipeRefreshLayout (>= 1.1.0.28)
Warning As Error: Detected package downgrade: Xamarin.Google.Android.Material from 1.12.0.5 to 1.12.0.4. Reference the package directly from the project to select a different version. 
 Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.Google.Android.Material (>= 1.12.0.5) 
 Net10Maui -> Xamarin.Google.Android.Material (>= 1.12.0.4)
Warning As Error: Detected package downgrade: Xamarin.AndroidX.Browser from 1.8.0.11 to 1.8.0.10. Reference the package directly from the project to select a different version. 
 Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Essentials 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Browser (>= 1.8.0.11) 
 Net10Maui -> Xamarin.AndroidX.Browser (>= 1.8.0.10)
Detected package version outside of dependency constraint: Xamarin.AndroidX.Fragment.Ktx 1.8.6.2 requires Xamarin.AndroidX.Fragment (>= 1.8.6.2 && < 1.8.7) but version Xamarin.AndroidX.Fragment 1.8.8.1 was resolved.
Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.Runtime.Ktx 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.Runtime (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.Runtime 2.9.2.1 was resolved.
Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.ViewModel.Ktx 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.ViewModel (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.ViewModel 2.9.2.1 was resolved.
Detected package version outside of dependency constraint: Xamarin.AndroidX.SavedState.SavedState.Ktx 1.2.1.17 requires Xamarin.AndroidX.SavedState (>= 1.2.1.17 && < 1.2.2) but version Xamarin.AndroidX.SavedState 1.3.1.1 was resolved.
Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.Runtime.Ktx.Android 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.Runtime (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.Runtime 2.9.2.1 was resolved.
Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.Process 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.Runtime (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.Runtime 2.9.2.1 was resolved.

Build Logs: 

Build started at 11:55 PM...
1>------ Build started: Project: Net10Maui, Configuration: Debug Any CPU ------
Failed to restore D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj (in 1.11 sec).
NuGet package restore failed. Please see Error List window for detailed warnings and errors.
1>C:\Program Files\dotnet\sdk\10.0.100-rc.1.25451.107\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.RuntimeIdentifierInference.targets(345,5): message NETSDK1057: You are using a preview version of .NET. See: https://aka.ms/dotnet-support-policy
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : warning NU1608: Detected package version outside of dependency constraint: Xamarin.AndroidX.Fragment.Ktx 1.8.6.2 requires Xamarin.AndroidX.Fragment (>= 1.8.6.2 && < 1.8.7) but version Xamarin.AndroidX.Fragment 1.8.8.1 was resolved.
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : warning NU1608: Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.Runtime.Ktx 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.Runtime (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.Runtime 2.9.2.1 was resolved.
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : warning NU1608: Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.ViewModel.Ktx 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.ViewModel (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.ViewModel 2.9.2.1 was resolved.
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : warning NU1608: Detected package version outside of dependency constraint: Xamarin.AndroidX.SavedState.SavedState.Ktx 1.2.1.17 requires Xamarin.AndroidX.SavedState (>= 1.2.1.17 && < 1.2.2) but version Xamarin.AndroidX.SavedState 1.3.1.1 was resolved.
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : warning NU1608: Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.Runtime.Ktx.Android 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.Runtime (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.Runtime 2.9.2.1 was resolved.
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : warning NU1608: Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.Process 2.8.7.4 requires Xamarin.AndroidX.Lifecycle.Runtime (>= 2.8.7.4 && < 2.8.8) but version Xamarin.AndroidX.Lifecycle.Runtime 2.9.2.1 was resolved.
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.Collection from 1.5.0.3 to 1.5.0.2. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.Google.Android.Material 1.12.0.4 -> Xamarin.AndroidX.Core 1.16.0.3 -> Xamarin.AndroidX.Collection (>= 1.5.0.3) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.Collection (>= 1.5.0.2)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.Activity from 1.10.1.3 to 1.10.1.2. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.Google.Android.Material 1.12.0.4 -> Xamarin.AndroidX.Fragment 1.8.8.1 -> Xamarin.AndroidX.Activity (>= 1.10.1.3) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.Activity (>= 1.10.1.2)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.Common from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.Common (>= 2.9.2.1) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.Navigation.Common (>= 2.8.9.2)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.Fragment from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.Fragment (>= 2.9.2.1) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.Navigation.Fragment (>= 2.8.9.2)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.Runtime from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.Runtime (>= 2.9.2.1) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.Navigation.Runtime (>= 2.8.9.2)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.Navigation.UI from 2.9.2.1 to 2.8.9.2. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Navigation.UI (>= 2.9.2.1) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.Navigation.UI (>= 2.8.9.2)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.SwipeRefreshLayout from 1.1.0.29 to 1.1.0.28. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.SwipeRefreshLayout (>= 1.1.0.29) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.SwipeRefreshLayout (>= 1.1.0.28)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.Google.Android.Material from 1.12.0.5 to 1.12.0.4. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Xamarin.Google.Android.Material (>= 1.12.0.5) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.Google.Android.Material (>= 1.12.0.4)
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605: Warning As Error: Detected package downgrade: Xamarin.AndroidX.Browser from 1.8.0.11 to 1.8.0.10. Reference the package directly from the project to select a different version. 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Microsoft.Maui.Controls 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Controls.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Core 10.0.0-rc.1.25452.6 -> Microsoft.Maui.Essentials 10.0.0-rc.1.25452.6 -> Xamarin.AndroidX.Browser (>= 1.8.0.11) 
1>D:\VSProjects\Net10Maui\Net10Maui\Net10Maui.csproj : error NU1605:  Net10Maui -> Xamarin.AndroidX.Browser (>= 1.8.0.10)
1>Done building project "Net10Maui.csproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ==========
========== Build completed at 11:55 PM and took 01.443 seconds ==========
========== Deploy: 0 succeeded, 0 failed, 0 skipped ==========
========== Deploy completed at 11:55 PM and took 01.443 seconds ==========

Expected behavior 🎯

Solution should get build without any errors

How to reproduce it (as minimally and precisely as possible) 🔬

  1. Open VS Insider 2026
  2. Create New Project with .NEt 10 as framework and select Maui Embedding as Feature
  3. Select any TFM
  4. Build Solution
  5. Observe build will fail with errors

Workaround 🛠️

No response

Renderer 🎨

  • Skia
  • Native

Affected platforms 📱💻🖥️

All platforms 🌍

Uno.Sdk version (and other relevant versions) 📦

sdk/template: 6.3.28
VS VSIX: 6.3.15

IDE version 🧑‍💻

Visual STudio 2026 Version: 18.0.0 Insiders [11018.127]

Anything else we need to know? 💬

No response

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difficulty/medium 🤔Categorizes an issue for which the difficulty level is reachable with a good understanding of WinUIproject/core-tools 🛠️Categorizes an issue or PR as relevant to core and tools

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