dotnet/csharp-tmLanguage

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Syntax grammar used for C# colorization

Stars: 78
Forks: 43
Open beginner issues: 0
Indexed issues: 36
Avg merge: 34m
Merged PRs (30d): 1

Dominant language: TypeScript
License: MIT
Last GitHub push: Sep 2, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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36 open issues indexed

C# syntax highlighting broken with collection expressions and string interpolation in method calls Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#332 · 7 comments · 1 reaction · Opened Jul 28, 2025
[Bug]: Top-level brace-scoped `using` declaration with object initializer containing `string` collection initializer with `;`, `{`, or `}` tokens in items break brace highlighting Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#336 · 3 comments · Opened Jan 26, 2024
[Textmate] `scoped ref` modifier Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dotnet/csharp-tmLanguage#306 · Opened Dec 22, 2023
[Textmate] Local function with attribute Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#304 · Opened Dec 21, 2023
[Textmate] Lambda with attribute Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

dotnet/csharp-tmLanguage#303 · Opened Dec 21, 2023
Add more C# language features and syntax sugar to highlightning Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

dotnet/csharp-tmLanguage#239 · 1 comment · Opened Mar 28, 2022
Grammar is slow on a line with a very long string literal (with embedded json) Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dotnet/csharp-tmLanguage#238 · 1 comment · Opened Mar 23, 2022
C# Syntax Highlighting Bug for Tuples & Multilined Variables Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#228 · 1 comment · Opened Oct 26, 2021
Non-ASCII identifier syntax highlighting Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#186 · Opened Sep 20, 2020
Several slow regular expressions in grammar cause freeze Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dotnet/csharp-tmLanguage#180 · Opened Apr 28, 2020
C# syntax highlighting is broken by multiline types Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#179 · 4 comments · 3 reactions · Opened Apr 28, 2020
VSCode crashes when pasting this very long line C# code Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#176 · Opened Feb 25, 2020
Tokenization freezes with long line like "((a+a) (a+a) (a+a) (a+a) ... Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#174 · Opened Feb 3, 2020
Grammar causes freeze on on long chain of ternary operators Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#170 · Opened Dec 20, 2019
Generate csharp.tmLanguage.yml using Roslyn Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

dotnet/csharp-tmLanguage#168 · 1 comment · Opened Nov 6, 2019
VSCode hangs when I open one C# file Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

dotnet/csharp-tmLanguage#166 · 1 comment · Opened Oct 16, 2019
Incorrect syntax coloring in interface definition Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

dotnet/csharp-tmLanguage#161 · 2 comments · Opened Aug 9, 2019
Tuple colorization wrong with missing spaces Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#160 · 1 comment · Opened Jul 29, 2019
interpolated strings interpolation should use different embedded scope Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#158 · 1 comment · Opened Jul 25, 2019
VSCode freezes tokenizing specific line of C# Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#155 · 1 comment · Opened Jun 19, 2019
C# syntax highlight glitch when using Tuple return type Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#154 · 2 comments · Opened May 30, 2019
C# syntax highlight does not work properly Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#150 · 1 comment · 1 reaction · Opened Feb 28, 2019
#else preprocessor directive loses colors with conditional operator Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#149 · Opened Feb 23, 2019
C# Method Syntax format grammar recognition Open

Resolved-Duplicate

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dotnet/csharp-tmLanguage#146 · 1 comment · Opened Jan 7, 2019
VS Code hanging when opening particular C# file Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

dotnet/csharp-tmLanguage#137 · 2 comments · Opened Sep 19, 2018
Splitting method in two lines between return type and name breaks syntax highlighting #2537 Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dotnet/csharp-tmLanguage#136 · 2 comments · Opened Sep 18, 2018
[C#] Deeply nested parens causes editor hang. Open

Resolved-Duplicate

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#135 · 10 comments · Opened Sep 13, 2018
Comment in try-catch exception parameter not highlighting Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

dotnet/csharp-tmLanguage#127 · Opened Jul 5, 2018
Reserved keyword coloring? Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

dotnet/csharp-tmLanguage#109 · 2 comments · Opened Apr 17, 2018
C# Code coloring glitches after method that returns Task of tuple Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#97 · 3 comments · Opened Jan 11, 2018
Code hangs when trying to open C# File Open

Bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

dotnet/csharp-tmLanguage#79 · 4 comments · 1 reaction · Opened Jul 20, 2017
VSCode hangs with 100% CPU in Code Helper process when viewing specific file Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#76 · 5 comments · Opened Jun 26, 2017
Syntax highlighting breaks when opening bracket of a method is placed in a new line Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#63 · 5 comments · 1 reaction · Opened May 17, 2017
Local variables declaration: Type keywords are not highlighted if the identifiers are on the next line Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#62 · 2 comments · Opened May 10, 2017
Function Signatures: Function names are not highlighted correctly when parameters are on the next line Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 32/100

dotnet/csharp-tmLanguage#61 · 2 comments · 1 reaction · Opened May 10, 2017
Freeze when dealing with long (unbreakable) strings Open

Bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

dotnet/csharp-tmLanguage#48 · 8 comments · Opened Mar 15, 2017

dotnet/csharp-tmLanguage

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