Using `IgnoredCodeIssues` with legacy C# extension

Environment

• .NET CLI 1.0.0-preview1-002702
• Mac OS X 10.11
• VS Code version: 1.2.1
• C# Extension version: Legacy C# (Unity development)

Issue

There’s this annoying issue with Unity development and VS Code where you get 99+ warnings instantly upon loading your project because of using System; at the top of virtually every Unity script.

Attempted, but Failed Solution

I found this Omnisharp Roslyn Issue (closed) which addresses what I am attempting to do, so I tried adding a omnisharp.json file to my project root with:

{
    "IgnoredCodeIssues": [
        "^Unnecessary using directive.$"
    ]
}

This, as you may already suspect, borks everything and throws a similar error:

System.FormatException: Unsupported JSON token 'StartArray' was found.
Path 'IgnoredCodeIssues', line 2 position 27.

I‘ve described the problem and my failed solution, is there any hope?

[jlmakes]

Thanks for the response @DustinCampbell

Updated Environment

• .NET CLI 1.0.0-preview2-1-003177
• Mac OS X 10.11
• VS Code version: 1.7.2
• C# Extension version: 1.5.3

The upgrade in C# extension seems to successfully replace the legacy extension with regards to mono support and working with Unity. Also, the warnings have indeed been downgraded to infos, and instead of showing 99+ it now explicitly counts 180 on my particular project.

But every file is still haunted with this…

Do you have any suggestions?

[DustinCampbell]

Yup. I totally agree that’s it’s pretty horrid. That’s why I’ll be taking a look at Remove Unnecessary Usings specific in 1.8.

Obsolete is probably not something I can help with – especially if it’s a generated project. I’d recommend touching base with Unity to add a <NoWarn> for obsolete warnings. Additionally, it might be worth adding a request for VS Code itself (e.g. https://github.com/Microsoft/vscode/issues) to allow turning off the display for info and warning in the Problems window.