Community toolkit install is not working

Lloyd Sheen 1,381

I have had community toolkit installed on this project for quite a while and now it gives the following error when I am trying to update:

Severity Code Description Project File Line Suppression State

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls.Compatibility from 8.0.14 to 8.0.6. Reference the package directly from the project to select a different version.

NHLMaui -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls.Compatibility (>= 8.0.14)

NHLMaui -> Microsoft.Maui.Controls.Compatibility (>= 8.0.6) NHLMaui C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\NHLMaui.csproj 1

I did an uninstall to see if an install would work other than the update but that gives same error.

I then had to rollback to versions 7 but I have code in the project that uses version 8 functions.

I have been looking at docs etc. in an attempt to install 8 but no luck.

The packages are :

C:\Users\sqlgu.nuget\packages\communitytoolkit.maui\7.0.1\

C:\Users\sqlgu.nuget\packages\communitytoolkit.mvvm\8.2.2\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.picker\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.licensing\25.1.40\

C:\Users\sqlgu.nuget\packages\newtonsoft.json\13.0.3\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.datagrid\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.core\25.1.40\

C:\Users\sqlgu.nuget\packages\microsoft.maui.controls.compatibility\8.0.6\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.buttons\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.carousel\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.inputs\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.listview\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.tabview\25.1.40\

C:\Users\sqlgu.nuget\packages\microsoft.maui.controls\8.0.6\

C:\Users\sqlgu.nuget\packages\microsoft.extensions.logging.debug\8.0.0\

Now the strange thing is that I had the community toolkit version 8 and while updating the nuget packages it gave the error. I also create a new Maui project and added first the Toolkit.Core (no problem). I then tried to install the Toolkit.Maui but get the same errors:

Severity Code Description Project File Line Suppression State

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls.Compatibility from 8.0.14 to 8.0.6. Reference the package directly from the project to select a different version.

TestToolKit -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls.Compatibility (>= 8.0.14)

TestToolKit -> Microsoft.Maui.Controls.Compatibility (>= 8.0.6) TestToolKit C:\Users\sqlgu\source\repos\TestToolKit\TestToolKit\TestToolKit.csproj 1

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls from 8.0.14 to 8.0.6. Reference the package directly from the project to select a different version.

TestToolKit -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls (>= 8.0.14)

TestToolKit -> Microsoft.Maui.Controls (>= 8.0.6) TestToolKit C:\Users\sqlgu\source\repos\TestToolKit\TestToolKit\TestToolKit.csproj 1

Error Package restore failed. Rolling back package changes for 'TestToolKit'.

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,656 Reputation points Microsoft Vendor

2024-04-18T08:16:15.2766667+00:00

Please click your MAUI project's Dependencies->net8.0-android->packages. Share all installed packages and specific version. I try to reproduce this issue. Or you can create a mini demo, install the same nugget packages and share this demo with us.
Lloyd Sheen 1,381 Reputation points

2024-04-18T13:10:35.2166667+00:00

The packages are :

C:\Users\sqlgu.nuget\packages\communitytoolkit.maui\7.0.1\

C:\Users\sqlgu.nuget\packages\communitytoolkit.mvvm\8.2.2\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.picker\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.licensing\25.1.40\

C:\Users\sqlgu.nuget\packages\newtonsoft.json\13.0.3\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.datagrid\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.core\25.1.40\

C:\Users\sqlgu.nuget\packages\microsoft.maui.controls.compatibility\8.0.6\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.buttons\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.carousel\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.inputs\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.listview\25.1.40\

C:\Users\sqlgu.nuget\packages\syncfusion.maui.tabview\25.1.40\

C:\Users\sqlgu.nuget\packages\microsoft.maui.controls\8.0.6\

C:\Users\sqlgu.nuget\packages\microsoft.extensions.logging.debug\8.0.0\

Now the strange thing is that I had the community toolkit version 8 and while updating the nuget packages it gave the error.
Lloyd Sheen 1,381 Reputation points

2024-04-18T13:14:59.23+00:00

I also create a new Maui project and added first the Toolkit.Core (no problem). I then tried to install the Toolkit.Maui but get the same errors:

Severity Code Description Project File Line Suppression State

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls.Compatibility from 8.0.14 to 8.0.6. Reference the package directly from the project to select a different version.

TestToolKit -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls.Compatibility (>= 8.0.14)

TestToolKit -> Microsoft.Maui.Controls.Compatibility (>= 8.0.6) TestToolKit C:\Users\sqlgu\source\repos\TestToolKit\TestToolKit\TestToolKit.csproj 1

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls from 8.0.14 to 8.0.6. Reference the package directly from the project to select a different version.

TestToolKit -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls (>= 8.0.14)

TestToolKit -> Microsoft.Maui.Controls (>= 8.0.6) TestToolKit C:\Users\sqlgu\source\repos\TestToolKit\TestToolKit\TestToolKit.csproj 1

Error Package restore failed. Rolling back package changes for 'TestToolKit'.

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,656 Microsoft Vendor

Lloyd Sheen Thanks for your update.

I create an empty MAUI project. Then I install all packages by your comment.

Before I update communitytoolkit.maui to 8.0.1, please update Microsoft.Maui.Controls to 8.0.14, then update Microsoft.Maui.Controls.Compatibility to 8.0.14, In the end, update CommunityToolkit.Maui to 8.0.1.

Do not select all nuget packages, then click update at the same time.

Here is my current installed nuget package.

<ItemGroup>
    <PackageReference Include="CommunityToolkit.Maui" Version="8.0.1" />

    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.2" />

    <PackageReference Include="Microsoft.Maui.Controls" Version="8.0.14" />

    <PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.14" />

    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="8.0.0" />

    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />

    <PackageReference Include="Syncfusion.Licensing" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.Buttons" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.Carousel" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.Core" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.DataGrid" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.Inputs" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.ListView" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.Picker" Version="25.1.40" />

    <PackageReference Include="Syncfusion.Maui.TabView" Version="25.1.40" />
</ItemGroup>

By the way, if you updated nugget packages. Please close this VS and reopen it.

Lloyd Sheen 1,381 Reputation points

2024-04-19T13:28:43.8033333+00:00

I did what you said on the new project and it installed 8. I then took my project uninstalled Toolkit, updated the controls to 8.0.2 and installed Core to 8.0.1 and attempted to install the actual Toolkit but same errors so no resolution as I had to install 70.1.

And since I tried that I now have about 10 of the following

Severity Code Description Project File Line Suppression State

Error CS0103 The name 'InitializeComponent' does not exist in the current context NHLMaui (net8.0-android), NHLMaui (net8.0-ios), NHLMaui (net8.0-maccatalyst), NHLMaui (net8.0-windows10.0.19041.0) C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\Views\Playoffs\Playoffs.xaml.cs 9 Active

I have had these before and at present my project has all sorts of "errors" which are not really errors since the project works. Does MS not think that making Visual Studio work without all the "delete these folders/clean project/rebuild" things would be the way to go?
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,656 Reputation points Microsoft Vendor

2024-04-23T06:29:49+00:00

I then took my project uninstalled Toolkit, updated the controls to 8.0.2 and installed Core to 8.0.1 and attempted to install the actual Toolkit but same errors

Please update Microsoft.Maui.Controls to 8.0.14, then update Microsoft.Maui.Controls.Compatibility to 8.0.14, In the end, update CommunityToolkit.Maui to 8.0.1.

If you still get this error, could you send a mini demo with us in the private message?

Error CS0103 The name 'InitializeComponent' does not exist in the current context NHLMaui

Can you run your application normally when you get this error?

I updated my VS to the 17.10.0 Preview 4.0, I get the same error. Then I close VS and open the VS installer, click the repair VS, after that, I open the project by VS and run it. This error disappear.

2 answers

Bruce (SqlWork.com) 56,286 Reputation points

2024-04-17T15:40:40.61+00:00

its pretty simple. the community toolkit needs a version of Microsoft.Maui.Controls.Compatibility >= 8.0.14, but your project is referencing an earlier version. update Microsoft.Maui.Controls.Compatibility nuget package to a version >= 8.0.14 (say the current 8.0.20) in the exe project

note: to stay current on all security issues, you should check for nuget package updates regularly. it should match your production release cycle (weekly, monthly).
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Lloyd Sheen 1,381 Reputation points

2024-04-17T17:32:02.1633333+00:00

While everything you said makes sense I have now spent last half hour trying to make things right. I have been updating nuget packages regularly but this has broken it. I am in an update loop as updating Microsoft.Maui.Controls.Compatibility seems somewhat weird. When I look at installed it has 8.0.6 installed and going to update to update it to 8.0.20 gives the following:

Restoring packages for C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\NHLMaui.csproj...

CACHE https://api.nuget.org/v3/vulnerabilities/index.json

CACHE https://api.nuget.org/v3-vulnerabilities/2024.04.17.00.57.37/vulnerability.base.json

CACHE https://api.nuget.org/v3-vulnerabilities/2024.04.17.00.57.37/2024.04.17.06.57.37/vulnerability.update.json

Installing NuGet package Microsoft.Maui.Controls.Compatibility 8.0.20.

Generating MSBuild file C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\obj\NHLMaui.csproj.nuget.g.props.

Generating MSBuild file C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\obj\NHLMaui.csproj.nuget.g.targets.

Writing assets file to disk. Path: C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\obj\project.assets.json

Successfully uninstalled 'Microsoft.Maui.Controls 8.0.20' from NHLMaui

Successfully uninstalled 'Microsoft.Maui.Controls.Build.Tasks 8.0.20' from NHLMaui

Successfully uninstalled 'Microsoft.Maui.Controls.Compatibility 8.0.6' from NHLMaui

Successfully uninstalled 'Microsoft.Maui.Resizetizer 8.0.20' from NHLMaui

Successfully installed 'Microsoft.Maui.Controls 8.0.6' to NHLMaui

Successfully installed 'Microsoft.Maui.Controls.Build.Tasks 8.0.6' to NHLMaui

Successfully installed 'Microsoft.Maui.Controls.Compatibility 8.0.20' to NHLMaui

Successfully installed 'Microsoft.Maui.Resizetizer 8.0.6' to NHLMaui

Executing nuget actions took 224 ms

Time Elapsed: 00:00:01.2925518

========== Finished ==========

After that if I go to Installed it shows 8.0.20 installed but it has a red X beside it and when I try to update the toolkit the error messages are :

Severity Code Description Project File Line Suppression State

Error Package restore failed. Rolling back package changes for 'NHLMaui'.

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls.Compatibility from 8.0.14 to 8.0.6. Reference the package directly from the project to select a different version.

NHLMaui -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls.Compatibility (>= 8.0.14)

NHLMaui -> Microsoft.Maui.Controls.Compatibility (>= 8.0.6) NHLMaui C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\NHLMaui.csproj 1

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls from 8.0.14 to 8.0.6. Reference the package directly from the project to select a different version.

NHLMaui -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls (>= 8.0.14)

NHLMaui -> Microsoft.Maui.Controls (>= 8.0.6) NHLMaui C:\VisualStudioProjectsDotNet8\NHLMaui\NHLMaui\NHLMaui.csproj 1
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Heikki Kortetmaa 0 Reputation points

2024-04-28T18:20:37.99+00:00

I basically have this same Issue: Severity Code Description Project File Line Suppression State

Error NU1605 Warning As Error: Detected package downgrade: Microsoft.Maui.Controls.Compatibility from 8.0.14 to 8.0.7. Reference the package directly from the project to select a different version.

APPNAME -> CommunityToolkit.Maui 8.0.1 -> Microsoft.Maui.Controls.Compatibility (>= 8.0.14)

CommunityToolkit 8.x version requires at least version 8.0.14 from Microsoft.Maui.Controls.Compatibility. I update that version I have tries other versions too but soon it reverses it back to version 8.0.7 in every Targets (android, windows and maccatalyst). Only solution has been to install earlier version of CommunityToolkit (7.x) which works with earlier version of Microsoft.Maui.Controls.Compatibility
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Lloyd Sheen 1,381 Reputation points

2024-04-28T19:56:32.6333333+00:00

I finally gave up on trying to update. I created a new project (same name) and installed the latest version of community toolkit. Doing this was quite a chore but after two months of trying to update toolkit and having it always fail I had to try something else.

Now in creating the new project it showed some of the things that VS does that are hard to imagine why. I found that simply copying the files in the old project one by one worked (since I had same project name the namespace remained the same so I did not have to do anything other than copy as the copy made the file part of the solution).

What was funny (not HA HA) was that I had several folders (like one for ContentPage(s)) and I tried to copy the entire folder but a copy from the old project and there was no paste in the context menu. I thought ok this is going to be a long process but then tried CTL=V. This copied the folder and all the sub folders and made all the contents part of the new solution. Perhaps VS should put the paste into the context menu since VS does what you would want it to.

All in all the update did not work as I have the same problem as described in other post to this question with the Microsoft.Maui.Controls.Compatibility not updating stopping the toolkit from updating.
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