Highlighting appears to be broken when using multi-line strings

[erichiller]

Issue Description

Highlighting appears to be broken when using multi-line strings. See the below, red characters and other strangeness. They aren't marked as errors, it is purely syntax highlighting.

Possibly related to #3718

I have tried this both with and without semantic highlighting (setting the below to both be true or false).

{
    "csharp.semanticHighlighting.enabled": true,
    "editor.semanticHighlighting.enabled": true,
}

If there is something more I can provide let me know! Thanks

This is a triple dash comment (A different issue, I know, but possibly related), it doesn't like &

Steps to Reproduce

• Create a multi-line string in a cs file.

Environment information

VSCode version: 1.48.1 C# Extension: 1.23.1

Dotnet Information

.NET Core SDK (reflecting any global.json): Version: 3.1.401 Commit: 39d17847db

Runtime Environment: OS Name: Windows OS Version: 10.0.18363 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\3.1.401\

Host (useful for support): Version: 3.1.7 Commit: fcfdef8d6b

.NET Core SDKs installed: 3.1.102 [C:\Program Files\dotnet\sdk] 3.1.302 [C:\Program Files\dotnet\sdk] 3.1.401 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
auto-using	Fudge	0.7.15
better-align	wwm	1.1.6
csharp	ms-dotnettools	1.23.1
docomment	k--kato	0.1.18
errorlens	usernamehw	3.2.1
gitignore	codezombiech	0.6.0
graphql-for-vscode	kumar-harsh	1.15.3
hexeditor	ms-vscode	1.2.1
jsdoc-markdown-highlighting	bierner	0.0.1
markdown-all-in-one	yzhang	3.2.0
msbuild-project-tools	tintoy	0.3.8
path-intellisense	christian-kohler	2.2.1
powershell-preview	ms-vscode	2020.7.0
rainbow-csv	mechatroner	1.7.1
remote-ssh-edit	ms-vscode-remote	0.51.0
selected-lines-count	gurumukhi	1.4.0
sqltools	mtxr	0.23.0
svg	jock	1.3.8
theme-karyfoundation-themes	karyfoundation	20.0.3
todo-tree	Gruntfuggly	0.0.178
vscode-docker	ms-azuretools	1.5.0
vscode-eslint	dbaeumer	2.1.8
vscode-great-icons	emmanuelbeziat	2.1.47
vscode-json5	mrmlnc	1.0.0
vscode-scss	mrmlnc	0.9.0
vscode-scss-formatter	sibiraj-s	2.0.2
vscode-solution-explorer	fernandoescolar	0.3.11
vscode-yaml	redhat	0.10.0

[jmarolf]

We believe that this is a bug in the VS Code implementation of semantic highlighting @JoeRobich will file a bug in the https://github.com/microsoft/vscode repo. Keeping this bug open until that is done.

[ghost]

at today is still broken

[harrybin]

is there any extension or workaround to fix this?