Problem upgrading to Uno 6

[HowardPWeiss]

I have a Linux C# Visual Studio Code Uno Project created with version 5.2.108 of the Uno.Sdk

If I create a new project it calls for Uno.Sdk 6.0.110. I want to upgrade my project to that version

My first step was to replace global.json in the first project

{
  // To update the version of Uno please update the version of the Uno.Sdk here. See https://aka.platform.uno/upgrade-uno-packages for more information.
  "msbuild-sdks": {
    "Uno.Sdk": "5.2.108"
  }
}

with gloabl.json from a newer project

`{
  // To update the version of Uno please update the version of the Uno.Sdk here. See https://aka.platform.uno/upgrade-uno-packages for more information.
  "msbuild-sdks": {
    "Uno.Sdk": "6.0.110"
  },
  "sdk":{
    "allowPrerelease": false
  }
}

When I do this an rebuild the project, I receive the following error

/home/howard/Desktop/Hello_Blocks_6/Hello/Hello.csproj : error NU1605: 
  Warning As Error: Detected package downgrade: Uno.Toolkit.WinUI from 7.0.0-dev.95 to 6.0.18. Reference the package directly from the project to selec
  t a different version. 
   Hello -> Uno.UI.HotDesign 1.11.182 -> Uno.Toolkit.WinUI (>= 7.0.0-dev.95) 
   Hello -> Uno.Toolkit.WinUI (>= 6.0.18)

 *  The terminal process "dotnet 'build', '/home/howard/Desktop/Hello_Blocks_6/Hello/Hello.csproj', '/property:GenerateFullPaths=true', '/property:TargetFramework=net8.0-desktop', '/consoleloggerparameters:NoSummary'" terminated with exit code: 1. 
 *  Terminal will be reused by tasks, press any key to close it. 

I googled the message but there were no hits. I do not understand the message or how to fix it

The Uno documentation talks about upgrading from Platform Uno 5.x to Uno Platform 6.0. How do I determine what version of the platform I am using? Does the platform version match the Uno Sdk version

uno-check is of no help

¤ Uno Platform Check v1.31.7.0 ¤
────────────────────────────────────────────────────────────────────────────────
This tool will check your Uno Platform development environment.
If problems are detected, it will offer the option to try and fix them for you, 
or suggest a way to fix them yourself.
────────────────────────────────────────────────────────────────────────────────
» Synchronizing configuration... ok
» Scheduling appointments... ok

› OpenJDK 11.0 Checkup...
  – 21.0.7 (/usr/lib/jvm/msopenjdk-21-amd64/bin/..)

› Android SDK Checkup...
  – emulator (34.2.13)
  × build-tools;35.0.0 (35.0.0) missing.
  × platforms;android-35 (1) missing.
  × system-images;android-35;google_apis;x86_64 (7) missing.
  – platform-tools (35.0.2)
  × cmdline-tools;13.0 (13.0) missing.

────────────────────────────────────────────────────────────────────────────────
¤ Recommendation: Install or Update Android SDK packages
Your Android SDK has missing or outdated packages.
You can use the Android SDK Manager to install / update them.
For more information see: https://aka.ms/dotnet-androidsdk-help
────────────────────────────────────────────────────────────────────────────────

! Attempt to fix? [y/n] (y): n

× Skipped: Android Emulator (The dependent check androidsdk is required first)

› .NET SDK Checkup...
  – 2.1.818 - /usr/share/dotnet/sdk/2.1.818
  – 3.1.426 - /usr/share/dotnet/sdk/3.1.426
  – 6.0.428 - /usr/share/dotnet/sdk/6.0.428
  – 7.0.410 - /usr/share/dotnet/sdk/7.0.410
  – 8.0.410 - /usr/share/dotnet/sdk/8.0.410
  – 9.0.100 - /usr/share/dotnet/sdk/9.0.100
  – 9.0.300 - /usr/share/dotnet/sdk/9.0.300

¬ Skipped: Git (Not required by the current configuration)

¬ Skipped: Linux Ninja Build (Not required by the current configuration)

› dotnet new Uno Project Command Line Templates Checkup...

› Uno SDK Checkup...

› .NET SDK - Workloads (9.0.300) Checkup...
  × android (Microsoft.NET.Sdk.Android.Manifest-9.0.100 : 35.0.61/9.0.100) is 
not installed.
  × maui-android (Microsoft.NET.Sdk.Maui.Manifest-9.0.100 : 9.0.51/9.0.100) is 
not installed.
  × wasm-tools (Microsoft.NET.Workload.Mono.ToolChain.Manifest-9.0.100 : 
9.0.5/9.0.100) is not installed.

────────────────────────────────────────────────────────────────────────────────
¤ Recommendation: Install or Update SDK Workloads
────────────────────────────────────────────────────────────────────────────────

! Attempt to fix? [y/n] (y): n
────────────────────────────────────────────────────────────────────────────────


! There were one or more problems detected.
Please review the errors and correct them and run uno-check again.

Press Enter to finish...

Since I am only building my application for Linux and Skia, I see no need to apply fixes for other platforms.

Please help

Howard Weiss

[jeromelaban]

Thanks for the report.

Since you're upgrading from Uno 5.2, you'll need to go through the different upgrade changes that were needed before. Those are listed in the upgrade docs: https://platform.uno/docs/articles/migrating-from-previous-releases.html.

Since 5.2 was a multi-project template, there may be multiple changes to make depending on what you used, as well as removing explicit package references that are now included in the uno.sdk since Uno 5.3.