CommunityToolkit.HighPerformance by: Microsoft

This package includes high performance .NET helpers such as: - Memory2D<T> and Span2D<T>: two types providing fast and allocation-free abstraction over 2D memory areas. - ArrayPoolBufferWriter<T>: an IBufferWriter<T> implementation using pooled arrays, which also supports IMemoryOwner<T>. - MemoryBufferWriter<T>: an IBufferWriter<T>: implementation that can wrap external Memory<T>: instances. - MemoryOwner<T>: an IMemoryOwner<T> implementation with an embedded length and a fast Span<T> accessor. - SpanOwner<T>: a stack-only type with the ability to rent a buffer of a specified length and getting a Span<T> from it. - StringPool: a configurable pool for string instances that be used to minimize allocations when creating multiple strings from char buffers. - String, array, Memory<T>, Span<T> extensions and more, all focused on high performance. - HashCode<T>: a SIMD-enabled extension of HashCode to quickly process sequences of values. - BitHelper: a class with helper methods to perform bit operations on numeric types. - ParallelHelper: helpers to work with parallel code in a highly optimized manner. - Box<T>: a type mapping boxed value types and exposing some utility and high performance methods. - Ref<T>: a stack-only struct that can store a reference to a value of a specified type. - NullableRef<T>: a stack-only struct similar to Ref<T>, which also supports nullable references.

ConfigureAwait.Fody by: Cameron MacFarland Simon Cropp

Configure async code's ConfigureAwait at a global level.

Confluent.Kafka by: Confluent Inc. Andreas Heider

Confluent's .NET Client for Apache Kafka

ConsoleControl by: Dave Kerr

The ConsoleControl is a WinForms control that you can drop into a Form to run an external process in a C# application.

CoreCompat.System.Drawing by: CoreCompat.System.Drawing

CoreCompat.System.Drawing

CoreProfiler by: teddy.ma

CoreProfiler - A .NET Core Profiling Library

CoreProfiler.Web by: teddy.ma

CoreProfiler.Web - A .NET Core Profiling Library

Costura.Fody by: geertvanhorrik simoncropp

Fody add-in for embedding references as resources.

coverlet.collector by: tonerdo

Coverlet is a cross platform code coverage library for .NET, with support for line, branch and method coverage.

Crc32.NET by: force

Fast version of Crc32 & Crc32C algorithms for .NET and .NET Core. It is up to 3x-5x times better than other "fast" implemenations. Code based on Crc32C.NET library.

CronExpressionDescriptor by: Brady Holt

A library that converts cron expressions into human readable descriptions. Supports multiple languages including: English, Brazillian, Spanish, Norwgian, Turkish, Dutch, Chinese Simplified, Russian, French, German, Ukrainian, Persian (Farsi), Polish, Romanian, Italian, Swedish, Slovenian, Danish, Finnish, Greek, Kazakh and Japanese.

Cronos by: Andrey Dorokhov Sergey Odinokov

A fully-featured .NET library for parsing cron expressions and calculating next occurrences that was designed with time zones in mind and correctly handles daylight saving time transitions.

CronScheduler.AspNetCore by: kdcllc

A lightweight Cron-based Scheduler for AspNetCore applications, designed for Kubernetes/Docker environments. An efficient alternative to Quartz Scheduler and HangFire.

CronScheduler.Extensions by: kdcllc

A powerful Cron-based Scheduler for .NET Core applications, optimized for Kubernetes/Docker and Windows Services. A lightweight alternative to Quartz Scheduler and HangFire.

CSharpFunctionalExtensions by: Vladimir Khorikov

CSharpFunctionalExtensions - functional extensions for C#

CsvHelper by: Josh Close

A library for reading and writing CSV files. Extremely fast, flexible, and easy to use. Supports reading and writing of custom class objects.

Cucumber.CucumberExpressions by: Cucumber Ltd Gaspar Nagy

Cucumber Expressions implementation for .NET.

Cucumber.Messages by: Cucumber Ltd TechTalk

JSON schema-based messages for Cucumber's inter-process communication

Dahomey.Json by: Michaël Catanzariti

The main purpose of this library is to bring missing features to the official .Net namespace System.Text.Json

Dahomey.Json.Attributes by: Michaël Catanzariti

Attributes assembly for https://github.com/dahomey-technologies/Dahomey.Json