C# (.NET) Community Chooses Best Libraries of 2024

C# (.NET) Community Chooses the Best Libraries of the Year: Top 10 Tools That Changed Development

The annual voting in the C# (.NET) ecosystem has concluded: the developer community has determined the best libraries of 2024. This year, over 5,000 programmers participated in the voting, and the candidate list included 120 projects. We have gathered the key results so you can update your tool stack.

Winners in Main Categories

• Best Library for Web Development: FluentValidation — a powerful tool for building validation with a fluent interface. The community noted its integration with ASP.NET Core and minimal boilerplate.
• Best Library for Testing: xUnit.net — the consistent leader in unit testing. This year, developers appreciated the new support for parallel tests and improved diagnostics.
• Best Library for Data Handling: Dapper — a lightweight ORM from Stack Overflow. Despite the growth of EF Core, Dapper remains popular for its speed and control over SQL queries.
• Best Library for AI and ML: ML.NET — Microsoft's own development. In 2024, a version was released with support for ONNX Runtime and ready-made models for text analysis.

Special Awards

• Breakthrough of the Year: OpenTelemetry .NET — a library for distributed tracing and monitoring. Its adoption in large projects has grown by 80% over the last six months.
• Community Choice: Serilog — structured logging. Developers value it for its flexibility of sinks (writing to files, databases, cloud) and ease of configuration.
• Best Library for UI: Avalonia UI — a cross-platform UI framework. It surpassed WPF and WinForms thanks to support for Linux, macOS, and WebAssembly.

Why This Matters for .NET Developers?

Each of these libraries solves a specific problem with minimal time investment. For example, FluentValidation allows you to reduce validation code by 2-3 times, and Serilog can automatically collect logs from multiple microservices. If you are just starting to learn C# or want to update your stack — start with these projects.

How Was the Voting Conducted?

The voting took place on the .NET Foundation platform in three stages: nomination (open call), semi-finals (top 20), and finals. The evaluation criteria were: popularity on NuGet, number of stars on GitHub, update frequency, and user reviews. All winners have stable versions and active support.

The full list of nominees and the voting archive are available on the official .NET Foundation website. You can already suggest libraries for the 2025 voting.