FirstIssue.devTheCloudTheory/Topaz
Good First Issues in C#
C# and the .NET ecosystem have a strong open source presence, with clear project structure that helps newcomers navigate.
24+ open beginner issues
19 repositories
June 27, 2026 last updated
Open C# issues for beginners
matsuzaki-hk/excel-mcp-japanese-support
⚠️ Upstream sync conflict detected (v1.8.70)
Project-Dumont/Dumont-Station
sprites de placas faltando
Project-Dumont/Dumont-Station
mapa da estação sem sprite de descarregado
dxura/dxrp
TV raycast annoyance
rwmt/Multiplayer-Compatibility
Run and Gun Outdated Patch
rwmt/Multiplayer-Compatibility
Smarter Construction Outdated Patch
DK-Anbuvel/Csharp_Exercise
Add your favourite Leetcode problems
DotHarness/dotcraft
feat: perforce integration
matsuzaki-hk/excel-mcp-japanese-support
⚠️ Upstream sync conflict detected (v1.8.70)
unchihugo/FluentFlyout
[FEATURE REQUEST] Add FluentFlyout User-Agent Header to all HttpClient sessions
valtuutus/valtuutus
feat: add MySQL/MariaDB data provider (Valtuutus.Data.MySql)
jfrazao/GenICam
Decide whether the feature-override list should reset on camera-identity change
NF-Software-Inc/zkteco-attendance-api
[Feature]: Add unit testing project
NF-Software-Inc/Easy-Logger
[Feature]: Add unit testing project
AYNSJC/Khel
Rigidbody not working always
Altinn/altinn-studio
Bug: missing return after context fail in StorageAccessHandler
ncalc/ncalc
The IN and NOT IN operators not working with types different from int
Fialuxe/MealBeBack
食育面解説の導入...?
kqkqku86-a11y/WPR
Changing the build from armv7 to armv8
OpenDreamProject/OpenDream
`()` should be a compile failure as of 516.1683
jfrazao/GenICam
Harden DeviceIndex resolution? (deterministic ordering + warn on ambiguous multi-producer index)
OpenDreamProject/OpenDream
`generator()` throws when low/high arguments are inverted
BigheadSMZ/Zelda-LA-DX-HD-Updated
Achievements need tested.
How to contribute to a C# project
Install the .NET SDK version from the README, then `dotnet build` and `dotnet test`. Most issues reproduce easily in this flow.
- Use `dotnet format` to match style before opening a PR.
- Reproduce the issue with a test first, then fix it.
- Look for `up-for-grabs` labels common across .NET repos.
Track these C# issues and get AI-matched
Sign up free to bookmark issues, track your pull requests, and get AI-picked matches for your exact skill level.
Start contributing — it's free