CoAP by: Longshine

CoAP.NET is an implementation in C# providing CoAP-based services to .NET applications.

CommandLineParser by: gsscoder nemec ericnewton76 moh-hassan

Terse syntax C# command line parser for .NET. For FSharp support see CommandLineParser.FSharp. The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command line arguments and related tasks.

Common.Logging by: Aleksandar Seovic Mark Pollack Erich Eichinger Stephen Bohlen

Common.Logging library introduces a simple abstraction to allow you to select a specific logging implementation at runtime.

Common.Logging.Core by: Aleksandar Seovic Mark Pollack Erich Eichinger Stephen Bohlen

Common.Logging.Core contains the portable (PCL) implementation of the Common.Logging low-level abstractions common to all other Common.Logging packages.

CommonServiceLocator by: Microsoft.Practices.ServiceLocation

The library provides an abstraction over IoC containers and service locators. Using the library allows an application to indirectly access the capabilities without relying on hard references.

CommunityToolkit.Mvvm by: Microsoft

This package includes a .NET MVVM library with helpers such as: - ObservableObject: a base class for objects implementing the INotifyPropertyChanged interface. - ObservableRecipient: a base class for observable objects with support for the IMessenger service. - ObservableValidator: a base class for objects implementing the INotifyDataErrorInfo interface. - RelayCommand: a simple delegate command implementing the ICommand interface. - AsyncRelayCommand: a delegate command supporting asynchronous operations and cancellation. - WeakReferenceMessenger: a messaging system to exchange messages through different loosely-coupled objects. - StrongReferenceMessenger: a high-performance messaging system that trades weak references for speed. - Ioc: a helper class to configure dependency injection service containers.

Configuration by: Cameron Fletcher Configuration contributors

A simple configuration library for .NET

Costura.Fody by: geertvanhorrik simoncropp

Fody add-in for embedding references as resources.

CrashReporter.NET.Official by: RBSoft

Send crash reports of your classic desktop application developed using .NET Framework directly to your mail's inbox with full exception report, stack trace and screenshot.

Crc32C.NET by: Robert Važan

Hardware-accelerated CRC-32C (Castagnoli) with super fast software fallback for .NET projects. Don't confuse with ordinary CRC-32. Automatically selects 32-bit or 64-bit embedded native library for maximum performance.

CronExpressionDescriptor by: Brady Holt Renato Lima Ivan Santos Siarhei Khalipski Mustafa SADEDİL Star Peng TotalMace LbISS Arnaud TAMAILLON Michael Schuler Taras(tbudurovych) rinaldihno

A library that converts cron expressions into human readable descriptions. Supports 14 languages: English, Brazillian, Spanish, Norwgian, Turkish, Dutch, Chinese Simplified, Russian, French, German, Ukrainian, Polish, Romanian and Italian.

CSRedisCore by: CSRedisCore

CSRedis 是 redis.io 官方推荐库，支持 redis-trib集群、哨兵、私有分区与连接池管理技术，简易 RedisHelper 静态类。

Dapper by: Sam Saffron Marc Gravell Nick Craver

A high performance Micro-ORM supporting SQL Server, MySQL, Sqlite, SqlCE, Firebird etc..

DeviceDetector.NET by: totpero

The Universal Device Detection library for .NET that parses User Agents and detects devices (desktop, tablet, mobile, tv, cars, console, etc.), clients (browsers, feed readers, media players, PIMs, ...), operating systems, brands and models. This is a port of the popular PHP device-detector library to C#. For the most part you can just follow the documentation for device-detector with no issue.

DH.NCode by: 湖北登灏科技有限公司

高性能 .NET 数据中间件（超级ORM），聚焦添删改查与海量数据，内置多级缓存、自动迁移、分表分库、强类型查询与跨库迁移。

DH.NCore by: 湖北登灏科技有限公司

Core library of NewLife framework. Provides high-performance infrastructure for building scalable applications: logging (file/network), configuration (XML/JSON/HTTP), cache (memory/distributed), network (TCP/UDP/HTTP/WebSocket), serialization (binary/XML/JSON), APM tracing, IoC container, actor model, timer scheduler, plugin framework, and more. Supports .NET Framework 4.5 to .NET 10. 核心组件库，为构建可扩展应用程序提供高性能基础设施。提供日志（文件/网络）、配置（XML/JSON/HTTP）、缓存（内存/分布式）、网络（TCP/UDP/HTTP/WebSocket）、序列化（Binary/XML/JSON）、APM性能追踪、对象容器、并行模型、定时调度、插件框架等。支持.NET Framework 4.5至.NET 10全版本。

DH.NCube.Core by: 湖北登灏科技有限公司

Web快速开发平台，搭建管理后台，灵活可扩展！内部集成了用户权限管理、模板继承、SSO登录、OAuth服务端、数据导出与分享等多个功能模块，在真实项目中经历过单表100亿数据添删改查的考验。

DH.SignalR by: 湖北登灏科技有限公司

用于DH框架的基于SignalR的实时推送库

DiffPlex by: Matthew Manela

DiffPlex is a diffing library that allows you to programatically create text diffs. DiffPlex is a fast and tested library.

diskann-garnet by: DiskANN Team

DiskANN FFI and Data Provider for Garnet