MACOS Rider errors with maui
Title: Rider fails to resolve MAUI XAML generated code (InitializeComponent and __XamlGeneratedCode errors), while project builds successfully via dotnet
Environment:
- Rider version: 2026.1.1
- OS: macOS 26.4.1
- .NET SDK: 10.0.203
- MAUI workload: maui 10.0.20/10.0.100 SDK 10.0.200
- Project type: .NET MAUI
---
Description:
Rider reports multiple errors related to XAML code generation in a .NET MAUI project, including:
- No defining declaration found for implementing declaration of partial method 'void InitializeComponent()'
- Cannot resolve symbol 'InitializeComponentRuntime'
- The type '__XamlGeneratedCode__.__TypeXXXX' must be convertible to 'Microsoft.Maui.Controls.ResourceDictionary'
However, the project:
- builds successfully using dotnet build
- runs correctly
- shows no such errors in other environments (e.g. VS Code)
This suggests Rider's design-time build or XAML code generation/indexing is out of sync with actual MSBuild behavior.
---
Steps to Reproduce:
1. Create or open a .NET MAUI project
2. Add one or more XAML files (e.g. ResourceDictionaries)
3. Reference them via:
xml <ResourceDictionary Source="SomeFile.xaml" />
4. Open the project in Rider
5. Observe errors in editor
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Expected Behavior:
- Rider correctly recognizes generated .g.cs files
- No false-positive errors for InitializeComponent
- XAML resources are resolved consistently with dotnet build
---
Actual Behavior:
- Rider shows unresolved InitializeComponent and related symbols
- Reports type conversion errors for generated __XamlGeneratedCode types
- Errors persist even after:
- rebuilding solution
- clearing bin/obj
- invalidating caches
---
Additional Notes:
- The issue seems related to Rider not properly handling MAUI XAML code generation
- Possibly tied to design-time build or MSBuild integration
- Opening and building the same project in Visual Studio may “fix” generation temporarily
---
Workarounds Tried:
- File → Invalidate Caches / Restart
- Deleting bin/ and obj/
- Forcing rebuild
- Verifying Build Action = MauiXaml
- Ensuring correct x:Class usage
---
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Hello!
We've tried to reproduce the issue you described, but with no success. According to your steps to reproduce, you can recreate the issue with a new sample solution. If so, could you please share it? Upload the file to our server and share the ID.
Thanks!
I had the same issue when creating a basic .Net 10 MAUI app via Rider. It looks like the issue is related to SourceGen being enabled, BUT triggered by a mismatch between the SDK and the workload. To resolve this, I just ran `dotnet workload update` and the issue was gone which might explain why Alexandra Guk could not reproduce it. Hope it helps!
Actually, I take it back. It doesn't work. The only thing I can do to resolve the issue is disable SourceGen by commenting out or removing this line from the project <MauiXamlInflator>SourceGen</MauiXamlInflator>
Hello Edward ,
Thank you for sharing this information.
Could you please clarify a couple of things for me:
Hi Anna,
1. Yes it persists, although I should clarify that I'm using .Net 10, not 9.
2. Invalidating Caches does not help, neither does removing the generated code - issue comes back as the code is re-generated.
Edward
Thank you, Edward , for the updates.
There is an issue that has been raised that seemingly reminds one that you have faced:
RIDER-117982 Rider reports errors but still builds successfully
Could you please provide logs from Help > Collect Logs and Diagnostic Data? Upload the archive to the comments of this issue. You may also change visibility permissions upon uploading if required.
Thank you in advance.
Hi,
If you tell me how I can upload archive to the comments of this issue, but I don't know how to confidently make it so that the settings of what I upload is available to Jetbrains support and only.
Thanks,
Eddie
Edward ,please follow the instructions below:
Set Issue, Comment, and Attachment Visibility
Anna Morozyuk, just a quick update to say that I'm back and will share the logs with you later tonight or tomorrow. I was away this weekend. Speak soon.
Hi Anna, I have tried, but I don't have an option to upload an attachment in comments. Your link also doesn't show instructions that match what I can see. Set Issue, Comment, and Attachment Visibility
Could it be because I'm not the issue author?
Hello Edward ,
Sorry for not articulating myself well, I meant in the YouTrack comment section:
Please attach the log archive here:
RIDER-117982 Rider reports errors but still builds successfully
Thank you in advance.
Hi Anna,
No worries - thanks for explaining. I've uploaded the attachment - it's tagged with jetbrains-team only, I'm assuming that means only JetBrains employees can see it. If not, can you please correct it for me?
Thanks,
Edward
Hey Edward ,
Yes, the attachemnt is visible only to Jetbrains team. Thank you.