OmniSharp: Select Project bug about cs10dotnet6

[johncflorida]

FYI - Just to try it, I installed the 1.23.18-beta2 vsix file using the following instructions (Installing Beta Releases) using the appropriate system .vsix file (v1.23.18-beta2 .vsix). It appears to have corrected the error above without and new issues so far. Bodes well for the stable release working as well when it comes out.

[johncflorida]

FYI - I'm running VS Code version 1.63.0 commit 2021-12-07T06:26:56.179Z on a Windows 10 machine.

[markjprice]

I've just tested with:

OS: Windows 11
Visual Studio Code: November 2021 1.63.0
C# extension: 1.23.17

When trying to use the Command Palette to run the Omnisharp: Select Project command I got the error, "Command 'OmniSharp: Select Project' resulted in an error (Extension 'ms-dotnettools.csharp' CANNOT use API proposal: quickPickSeparators. Its package.json#enabledApiProposals-property declares: [] but NOT quickPickSeparators. The missing proposal MUST be added and you must start in extension development mode or use the following command line switch: --enable-proposed-api ms-dotnettools.csharp)", as shown in the following screenshot:

I suggest waiting for the update to the C# extension and OmniSharp. Hopefully it'll be released in a few days. I will leave this issue open and retest once the update is released.

[markjprice]

Selecting the project for OmniSharp is not required to have multiple projects in a workspace. It just means you will be missing some IntelliSense and debugging features. A temporary fix is to copy the .vscode folder from the HelloCS project into the TopLevelProgram project. That will enable the missing features.

[johncflorida]

Yes, confirmed. That is the same error I see. I'll try copying the .vscode folder as suggested. I am also watching the OmniSharp project for the release of 1.23.18. Once it's released I will try as well and report back.

[markjprice]

Since this is still an active issue (someone else raised it again a few hours ago) I am reopening this issue and adding an erratum.

[KenGBroadwell]

Hi,
Currently the extension c# for Visual Studio Code breaks with a message :-
Command 'OmniSharp: Select Project' resulted in an error (Extension 'ms-dotnettools.csharp' CANNOT use API proposal: quickPickSeparators.
Its package.json#enabledApiProposals-property declares: [] but NOT quickPickSeparators.
The missing proposal MUST be added and you must start in extension development mode or use the following command line switch: --enable-proposed-api ms-dotnettools.csharp)

I’m running Windows 11 – in case this is a reason

Work around is that the current version which is 1.23.17 is to move to beta which can be found at

https://github.com/OmniSharp/omnisharp-vscode/releases/tag/v1.23.18-beta2

I used the csharp-1.23.18-win32-x64.vsix version

It’s installed by the meatballs menu top right of extensions , and selecting ‘install by vsix’

Hope this is helpful

[carlosbetogomez]

Hi,

Had the same issue, looks like it only happens on VSC version 1.63.x, I downgraded the version to 1.62.3 and problem solved.

PD: Thanks for the book and for your effort to support the community.

[markjprice]

This issue has now been resolved with the release of C# extension 1.24.0 on January 20, 2022: https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csharp