#csharp

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Excelize is a C# port of Go Excelize library that allow you to write to and read from XLAM / XLSM / XLSX / XLTM / XLTX files.

AutoFixture is an open source library for .NET designed to minimize the 'Arrange' phase of your unit tests in order to maximize maintainability. Its primary goal is to allow developers to focus on what is being tested rather than how to setup the test scenario, by making it easier to create object graphs containing test data.

The next generation Minecraft launcher core written in C# providing the freest, fastest and the most complete experience.

Advanced .NET reflection toolkit for AI-driven scenarios. Dynamically invoke methods with JSON, generate schemas, and serialize complex objects with type preservation. Perfect for automation, testing, and AI integration.

A C# .netstandard client library for the Bitfinex REST and Websocket API focusing on clear usage and models

.NET framework for A/B testing, feature flags, trial fallback, and observability.

A Semantic Kernel connector that bridges your local Claude Code OAuth session into Microsoft Semantic Kernel — no manual API key management needed.

A logger for MSBuild that records a structured representation of executed targets, tasks, property and item values.

An update to Component factory's krypton toolkit to support .NET Framework 4.6.2 - 4.8.1 to .NET 8 - 10

SPICE netlists parser for .NET

Core API for Meadow .NET IoT

FusionCache is an easy to use, fast and robust hybrid cache with advanced resiliency features.

QuestPDF.Markdown allows rendering markdown into a QuestPDF document

A header-only C++ library for interacting with crypto exchanges. Bindings for Python, Java, C#, Go, and Javascript are provided.

A Roslyn source generator for creating constructors.

Prevent memory leaks and runtime crashes in .NET Dependency Injection. A zero-overhead Roslyn analyzer that catches captive dependencies, undisposed scopes, and lifetime mismatches at compile-time.

Modern ECS framework for .NET

The .NET Terminal Application Stack

Serde.NET is a C# port of the popular Serde serialization library for Rust

The fastest .NET async lock

A lock free atomic nullable boolean.

A .NET thread-safe singleton For AWS's basic credential object, BasicAWSCredentials

A Blazor library for drawing smooth signatures, an interop for signature_pad

A .NET authorization filter for requiring Cloudflare sourced traffic

Various constants for displaying to users

A utility to copy to and from Cosmos databases and containers

US ZIP code data from USPS, updated daily

An externally initializing singleton dictionary that uses double-check asynchronous locking, with optional async and sync disposal

A collection of helpful DateTimeOffset extension methods