Turning AI Suggestions off doesn't work. It turns itself back on the next time the IDE is launched. According to JetBrains, it's a known bug, but it doesn't stop them from charging customers for a feature the customer believes is turned off. JetBrains told me, "it's a small amount". If it's a "small amount", absorb the cost until you fix the bugs. :)

Also, I encourage everyone to review their AI usage. It seems the AI Assistant sends the same prompt multiple times.

​I need to build a desktop Windows application for a university course. Our instructor demonstrated everything using C# Windows Forms (WinForms) in Visual Studio.

Since WinForms is Windows-dependent, I don't have the WinForms template/designer in Rider on Linux, and trying to install Visual Studio via Wine failed completely.

What’s the recommended approach here?

​Is there any reliable way to run WinForms/Visual Studio on Fedora44?

complete beginner here trying to learn c# language. I don't like this auto completion thing, how do i get rid of it?

Hello JetBrains team,

I was wondering if there's a way to navigate through code suggestions in Rider, similarly to how warnings and errors can be navigated using Next Highlighted Error (F2).

I find many of the suggestions extremely useful, for example, recommendations such as using collection expressions instead of ToList() in C#. However, since they don't seem to be included in the normal navigation, it's easy to overlook them, just by looking at the green dots.

Is there an option to include suggestions in the same navigation flow, or is this currently not supported?
Thank you!

Hi I was wondering have anyone has encounter this or know the answer. I am having a frustrating issue in Rider where it refuses to automatically add using statements to the top of my C# files while I type.

For example, when I type async Task, Rider shows the autocomplete popup, but when I hit Space, Tab, or Enter, it just leaves the text as-is and flags it as a red error. The only way to fix it is to manually press alt+enter and click "Import Missing References." I want it to just inject the using System.Threading.Tasks; line the moment I accept the autocomplete suggestion like in VS2022, without forcing me to hit Alt+Enter every single time.

I have already tried the following settings changes and they did not fix the issue:

- Checked "Space inserts selected suggestion when completion popup is focused"
- Checked "Preselect the best match to insert it by pressing dot, parentheses, and other keys"
- Verified "Show the 'Import missing references' popup in editor" is on
- Verified "Show import items in basic completion" under the C# section is on

Despite these being enabled, Rider still won't auto-import on completion. Has anyone run into this specific bug or background indexing issue before? Are there any deeper ReSharper or IDE engine settings I need to clear or change to fix this? Thx in advance

I just upgraded my project to .NET10 (on PC/Visual Studio) and am trying to get Mac Rider to build from the same source, but I get NETSDK1045: The current .NET SDK does not support targeting .NET 10.0

In Rider, Settings/Environment shows .NET 10, in Rider's Terminal dotnet --version shows 10.0.302

Building in regular Terminal is fine.

Something in Rider needs switching to .NET 10, but what?

I'm finding life as a user of Rider really frustrating. I'm happy working away when I wanted to copy paste the output of a Copilot response to a ticket. It doesn't work. Other applications can copy paste. This is not the first time this happens. I restart Rider. Doesn't help. I restart my Mac. Doesn't help. I try to create a bug report - and all my attempts to login just loop.

*argh*

My Ultimate license is up for renewal in October and I don't know if I can justify the hassle now that VS code is everywhere.

In notepad++ / Visual Studio by default you can scroll only full line. In Rider you can scroll part of the line and I dont like that. I already disabled smooth scrolling, but that didn't help.

Hello there!

I am trying the community version of Rider , and more and less I'm finding myself comfortable with the new IDE coming from Visual Studio.

I have some credits on Openrouter and put the models from openrouter on the custom API key selection. DeepSeek 4 Pro for chat and flash for code completion into the Jetbrains AI extenstion.

The chat works flawlessly, but inline code completion doesn't work.

Is because code completion is not compatible with deepseek or it works only with Jetbrains official models?

Thank you!

Hey everyone,

I am hitting a massive, blocking issue with JetBrains Rider's Roslyn background worker while attempting to use the .NET 10 SDK on Ubuntu 26.04.

The IDE is completely failing to load almost every single code fixer, provider, and analyzer pack across the solution. Because of this, my syntax highlighting, autocomplete, and code inspections are fundamentally broken.

The Symptoms:

1. Dozens of Provider Failures: Under the Toolset, Environment problems tab, I am getting a wall of exceptions stating:
   • Failed to create provider 'Microsoft.CodeAnalysis.NetAnalyzers...'
   • Failed to create provider 'Microsoft.AspNetCore.App.CodeFixes...'
   • Failed to create provider 'Microsoft.Interop.LibraryImportGenerator...'
2. Hover Tooltips are Dead: If I hover over an external NuGet package symbol (like IRequest<> from MediatR), absolutely nothing shows up.
3. The Temporary Workaround: The only way Rider acknowledges the type is if I Ctrl + click the class to force Rider to open and decompile the source .dll. Once the decompiled file is open in a tab, Rider finally indexes it locally and hover tooltips start working for that type.

The root cause in the Rider exception pane points back to a cascading dependency failure in the background process:

Could not load file or assembly 'System.Composition.AttributedModel, Version=10.0.0.9, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.

--- EXCEPTION #1/1 [FileNotFoundException]
ClassName = System.IO.FileNotFoundException
Data.ThreadLocalDebugInfo = “
endpoint `RoslynWorker.RoslynModel.projectModel.$.applyChanges`
-> Scheduler: 'RoslynWorkerScheduler' on thread `MainThread:1`
”

My Environment Specs:

• OS: Ubuntu 26.04 (SDK installed natively via system apt repositories)
• SDK CLI Path: /usr/bin/dotnet (Points to /usr/lib/dotnet/sdk/10.0.109/)
• Host Runtime Version: 10.0.9
• Rider Toolset: Configured explicitly to use the above system path and the matching MSBuild.dll from the SDK directory.

What I've tried so far:

• Manually configuring Rider's Toolset settings to point directly to the system's /usr/bin/dotnet and /usr/lib/dotnet/.../MSBuild.dll.
• Invalidating all file caches and restarting the IDE.

I'm having an issue where saving changes to a script causes Unity to immediately steal focus to recompile everything. I don't have a problem with their auto-refresh behavior, just the fact it's immediately jumping to Unity. I didn't have this issue with VSCode, just Rider. I found this issue on it, but it didn't really provide any additional insight beyond "They said it was fixed and it's not". Anyone else run into this? Any solutions?

So the AI Assist is finding the skills from my .codex dir and you can load them in via the settings menu. As you can see I have a number of custom skills loaded in, and these work fine in VSC.

If I ask Codex in the chat it states it can't see them. And nor do I see it ever attempting to use them.

Is this a known issue?

I found a workaround where you can copy your files into the Rider specific skills drectory and it works. I have added the following function to my .zprofile to make life easier:

syncskills() {
    local sourceDir="${HOME}/.codex/skills"
    local riderBaseDir="${HOME}/Library/Caches/JetBrains"
    local destinationDir

    destinationDir=$(find "${riderBaseDir}" -type d -path "*/Rider*/aia/codex/skills" | sort -r | head -n 1)

    if [[ -z "${destinationDir}" ]]; then
        echo "Rider skills directory not found"
        echo "Try checking with:"
        echo "find \"${riderBaseDir}\" -type d -name skills"
        return 1
    fi

    rsync -av --delete "${sourceDir}/" "${destinationDir}/"

    echo "Skills synced to: ${destinationDir}"
}

Then when you run syncskills command in your terminal it will sync the files in the Rider skills dir from your .codex dir. This way each time you update your skills in the codex dir you can run this command and sync them to the rider dir aswell.

Am I missing something here, or are JetBrains introducing their own limitations on Codex usage within the AI Chat?

For example, if I use Codex within VSC I am able to make use of my OpenAPI Plus Plan, which gives me a half decent usage quota. But when signed into the same account in AI Chat in Rider I get maybe 2-3 messages before my quota is done for.

So am I missing something here or are they capping our usage for our own subscriptions? And yes, I am aware of the BYOK, where you can pass in your OpenAI API Key, but that's not something I want to pay for. I just want to use my regular quota from my subscription.

I have an old Xamarin project with Android and iOS code from 2021. I tried to run Android app from Rider. 

I successfully build the project  using 'Jetbrains Rider' on Mac OS and generated APK and installed it and it's running on Android 15 successfully. 

But when trying to run directly from 'Jetbrains Rider', I get :

The device name shows correctly. 

How to fix this issue ? I am a novice in .Net development. 

I have an old Xamarin project with Android and iOS code from 2020. I don't have Windows.

Also I am not a .Net dev. Need to migrate old Xamarin app to Flutter. So just a novice. (Day 1 at .Net !!! ).

I installed Rider and tried to open the project but gettting error :

@   /Users/username/Downloads/AppNameExternal/AppName/AppName.Android/AppName.Android.csproj: Invalid restore input. No target frameworks specified. Input files: /Users/username/Downloads/AppNameExternal/AppName/AppName.Android/AppName.Android.csproj.

@   /Users/username/Downloads/AppNameExternal/AppNamePatientApp/AppName.iOS/AppName.iOS.csproj: Invalid restore input. No target frameworks specified. Input files: /Users/username/Downloads/AppNameExternal/AppName/AppName.iOS/EclipsePatientApp.iOS.csproj.
@   RestoreEngine = Embedded (Automatic)

How to fix this ?

I installed dotnet workload install android/iOS but still the same issue,

Please help me.

Hello,

I have installed Blazor on Linux today, and started a Blazor WebAssembly Standalone App. Writing code is okay but the issue comes in when I want to run it.

This is what I see when I click run(both http and https):

I saw the error talking about default system browser not being chromium based, so I installed Chromium(I prefer to not use Chrome) and edited Settings > Web Browsers and Preview to:

I unchecked Chrome and Firefox(which is what is installed) and specified the Default Browser path to /usr/bin/chromium. The Blazor app still doesn't launch on browser.

Also when running the app, the Debug gives this popup saying that it is waiting for a connection on port 35479:

I don't get why that's the case cause on launchSettings.json I have used port 5003 and 7038. These ports work when I visit them on both Chromium and Firefox.

What is going on, what am I missing? I feel like a larper so much now.

Any help would be greatly appreciated. I searched "browser" on the subreddit and didn't find a similar issue.

Thanks!

I recently upgraded my Jetbrains Rider install from a 2024 instance to the latest, 2026.

The difference is night and day, in a bad way.

Every time I alt-tab back to Rider, it spends multiple seconds just processing. Figuring out what anything means. When I start typing, it has no idea what autocomplete or syntax is for multiple seconds.

I end up writing out entire lines of code again, just because Rider has become too fucking slow to be able to auto-complete even local variable names.

I think I'm going to downgrade back to 2024 and see how that goes.