The error and warning list increments with the same items after every typing.

[jrieken]

From @heshuimu on June 22, 2016 11:32

• VSCode Version: 1.2.1
• OS Version: macOS Sierra 10.12 Beta(16A201w)

Steps to Reproduce:

I was using VS Code with Legacy OmniSharp to develop Unity projects. There is a plugin I used has a wrapper script used a namespace that Unity somehow did not expose (although the code compiles since the namespace does exist), which shows as an error. There are also several warnings due to unnecessary using directives.Whenever I stop typing the error/warning counter would go up and it would be several duplicated entries for one error/warning.

1. Open a Unity project and set up to use VS Code with dotBunny/VSCode.
2. Create a new script and write something so that it makes an error or a warning.
3. Create another script, and while writing things in it, watch the error/warning counters go up whenever OmniSharp does the check. Reveling the list will show duplicated error/waring items.

Copied from original issue: microsoft/vscode#7996

[DustinCampbell]

This is a duplicate of dotnet/vscode-csharp#587.

The legacy C# extension is no longer supported, but the C# extension fully supports Unity projects. Note that the very latest C# extension (1.5-beta4) should address this problem.