Omnisharp-vscode: Told to install c# extension when already installed

[zachstronaut]

Issue Type: Bug

When I open a c# file I'm told to install the c# extension. If I click the Install button it opens "@id:ms-vscode.csharp" in the Extensions: Marketplace and says "No extensions found."

Also, I've already got the c# extension installed!

Issue occurred after installing latest Safari and Security update for Mac OSX 10.14.6.

I've tried uninstalled and reinstalling the extension. I've tried re-installing dot net cli/sdk and mono and then reinstalling the extension. Nothing has helped.

Extension version: 1.21.13
VS Code version: Code 1.42.1 (c47d83b293181d9be64f27ff093689e8e7aed054, 2020-02-11T14:44:27.652Z)
OS version: Darwin x64 18.7.0

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i7-5557U CPU @ 3.10GHz (4 x 3100)|
|GPU Status|2d_canvas: enabled
flash_3d: enabled
flash_stage3d: enabled
flash_stage3d_baseline: enabled
gpu_compositing: enabled
metal: disabled_off
multiple_raster_threads: enabled_on
oop_rasterization: disabled_off
protected_video_decode: unavailable_off
rasterization: enabled
skia_renderer: disabled_off
surface_control: disabled_off
surface_synchronization: enabled_on
video_decode: enabled
viz_display_compositor: enabled_on
viz_hit_test_surface_layer: disabled_off
webgl: enabled
webgl2: enabled|
|Load (avg)|9, 7, 5|
|Memory (System)|16.00GB (0.70GB free)|
|Process Argv||
|Screen Reader|no|
|VM|0%|

[atticdweller]

Same issue here on Windows 10. Using issue persists on Unity 2019.2.21f1 and 2019.2.13 even after uninstalling and reinstalling both Unity and VS Code.

[zachstronaut]

I believe this is the cause: https://github.com/OmniSharp/omnisharp-vscode/issues/3620

[zachstronaut]

Roll back 1.21.12 people!

Uninstall c# extension

download csharp-1.21.12.vsix
https://github.com/OmniSharp/omnisharp-vscode/releases/tag/v1.21.12

run:
code --install-extension csharp-1.21.12.vsix

wow look at that intellisense works again after 90 minutes of frustration because the c# extension unique id was changed

[atticdweller]

This worked for me!

Extra step I had to do to get it working was to delete the old generated .sln and .csproj files in the Unity project root folder.

@zachstronaut thank you for your help!

[Vixxd]

Roll back 1.21.12 people!

Yep, confirming this works - IntelliSense is working. I chose a really bad afternoon to use Unity with VSCode for the first time.

[mareklinka]

Related: the change of the extension ID broke some other VSC extensions as well, like Roslynator and Auto-Using who depend on the old ID.

[AddisonYarborough]

Can also confirm this works, thank you for the fix!

[JoeRobich]

I've got an update. I've verified that the latest stable and insiders releases, which are available now, no longer suggest installing the C# extension from the old publisher. However, extensions with dependencies on the C# extension still need to be republished specifying the new publisher.

[cartermp]

Thanks for reporting. The issue is due to the publisher rename, which has broken the unity extension. There is a pull request merged on the unity extension, and once the extension updates go through, it should be resolved. Closing as a duplicate of #3620