[WebToolsE2E][Blue]Add code “@addTagHelper *,Microsoft.AspNetCore.Mvc.TagsHelpers” in first line in Layout.cshtml file, there is a yellow wavy line below the first line of code and message "@addTagHelper directive is unnecessary." show up in Problems tab

[Susie-1989]

REGRESSION INFO: Works well for C# Jan release 2.120.3

INSTALL STEPS

1. OS: window x64
2. Install SDK 10.0.201
3. Install VS Code insiders - 1.113.0
4. Install March prerelease (03/18)C# 2.131.79

REPRO STEPS

1. Use below code to create razor project
   dotnet new razor --use-program-main -o razor333
2. Use vs code to open this project and open Layout.cshtml file, type code “@addTagHelper *,Microsoft.AspNetCore.Mvc.TagsHelpers” in first line

ACTUAL There is a yellow wavy line below the first line of code， message "@addTagHelper directive is unnecessary." show up in Problems

EXPECTED There is no a yellow wavy line below the first line of code， no message show up in Problems tab.

[davidwengier]

The problem being reported and fading are both features, not bugs, but it probably shouldn't have a squiggle. Will fix.

[github-actions]

@Susie-1989 @davidwengier

This issue has been fixed! Please update to the latest versions of VS Code, C# Dev Kit, and the C# extension.