Hi, From my maui app I have two ProjectRefrences to 8 , how to change them to 9 ? Curret: <PropertyGroup> <TargetFramework>8.0.0</TargetFramework> <PropertyGroup>

Hello, Detailed steps on how to upgrade Maui to .net 9.0 and details on how to change the Project file have been provided by the .net Maui official documentation. You could refer to the following documentation for details. Upgrade from .NET 8 to .NET 9 . Best Regards, Alec Liu. If the answer is the right solution, please click " Accept Answer " and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

MAC - change project reference from 8 to 9 using VS code

Accepted answer

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 47,686 Reputation points Microsoft Vendor

2025-01-24T01:05:06.6333333+00:00
Hello,

Detailed steps on how to upgrade Maui to .net 9.0 and details on how to change the Project file have been provided by the .net Maui official documentation. You could refer to the following documentation for details.

Upgrade from .NET 8 to .NET 9.

Best Regards,

Alec Liu.

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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1 person found this answer helpful.
Dani_S 3,956 Reputation points

2025-01-24T05:05:21.0433333+00:00

Im asking about project refrence..

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 47,686 Reputation points Microsoft Vendor

2025-01-24T05:43:28.4633333+00:00

Are you referring to the issue of upgrading the Maui Class Library referenced in the .net maui project to .net 9? Whether it is the Maui Class Library, Maui project or Maui Blazor, the upgrade steps are the same as the documentation provided.

Dani_S 3,956 Reputation points

2025-01-24T05:46:55.0866667+00:00

Yes class library.how is done?

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 47,686 Reputation points Microsoft Vendor

2025-01-24T05:55:50.65+00:00

Please refer to the following steps:

Step 1. Update the .net version to 9.0 in class library project file.

Modify

<TargetFrameworks>net8.0-android;net8.0-ios;net8.0-maccatalyst;net8.0-tizen</TargetFrameworks> <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.19041.0</TargetFrameworks>

To

<TargetFrameworks>net9.0-android;net9.0-ios;net9.0-maccatalyst;net9.0-tizen</TargetFrameworks> <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net9.0-windows10.0.19041.0</TargetFrameworks>

Step 3. Remove Microsoft.Maui.Controls.Compatibility NuGet package, then upgrade the Microsoft.Maui.Controls to latest version.Step 3. If your app targets iOS or Mac Catalyst, update the $(SupportedOSPlatformVersion) build properties for these platforms to 15.0:

<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">15.0</SupportedOSPlatformVersion> <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst'">15.0</SupportedOSPlatformVersion>

Step 4. Re-reference this ClassLibrary in your Maui project. Prior to building your upgraded app for the first time, delete the bin and obj folders.

Dani_S 3,956 Reputation points

2025-01-24T06:09:04.73+00:00

Im talking updaing the class library.I Change from 8 to 9? Step 4 why to rerefrence this class llbrary

Dani_S 3,956 Reputation points

2025-01-24T06:14:45.64+00:00

How to rerefrence this class library, im using vs code.

Dani_S 3,956 Reputation points

2025-01-24T06:30:18.71+00:00

.......

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 47,686 Reputation points Microsoft Vendor

2025-01-24T06:46:29.6833333+00:00

Re-reference is to avoid compilation failure caused by caching. If your project can be compiled, you don't need to re-reference it. In the case of VS Code, you can reference the Class Library by changing the project file of the Maui project.

<ItemGroup> <ProjectReference Include="..\YourLibName\YourLibName.csproj" /> </ItemGroup>
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