ClosedXML.Parser by: Jan Havlíček

A lexer and parser of Excel formulas with focus on performance. Its goal is to create an abstract syntax tree from a formula text to enable formula evaluation.

ClosedXML.Report by: Alexey Rozhkov, Alexey Pankratev

ClosedXML.Report is a tool for report generation and data analysis in .NET applications through the use of Microsoft Excel. ClosedXML.Report is a .NET-library for report generation Microsoft Excel without requiring Excel to be installed on the machine that's running the code.

Cocona by: Mayuki Sawatari

Micro-framework for .NET console application. Cocona makes it easy and fast to build console applications on .NET.

Cocona.Core by: Mayuki Sawatari

Core component for Cocona. Micro-framework for .NET console application.

Cocona.Lite by: Mayuki Sawatari

Lightweight version of Cocona. Micro-framework for .NET console application. Cocona makes it easy and fast to build console applications on .NET.

CoinAPI.WebSocket.V1 by: COINAPI LTD

SDK for www.CoinAPI.io WebSocket API

ColorHelper by: Artyom Gritsuk

This library contains several useful classes: - ColorConverter RgbToHex RgbToCmyk RgbToHsv RgbToHsl RgbToXyz RgbToYuv RgbToYiq HexToRgb HexToCmyk HexToHsv HexToHsl HexToXyz HexToYuv HexToYiq CmykToRgb CmykToHex CmykToHsv CmykToHsl CmykToXyz CmykToYuv CmykToYiq HsvToRgb HsvToHex HsvToCmyk HsvToHsl HsvToXyz HsvToYuv HsvToYiq HslToRgb HslToHex HslToCmyk HslToHsv HslToXyz HslToYuv HslToYiq XyzToRgb XyzToHex XyzToCmyk XyzToHsv XyzToHsl XyzToYuv XyzToYiq YiqToRgb YiqToHex YiqToCmyk YiqToHsv YiqToHsl YiqToXyz YiqToYuv YuvToRgb YuvToHex YuvToCmyk YuvToHsv YuvToHsl YuvToXyz YuvToYiq - ColorComparer - ColorGenerator GetRandomColor GetLightRandomColor GetDarkRandomColor Enums - ColorName

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: .NET Foundation and Contributors

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.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.

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.

ConcurrentHashSet by: Bar Arnon

A thread-safe hash-based set

Configuration by: Cameron Fletcher, , Configuration contributors

A simple configuration library for .NET

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

Confluent.SchemaRegistry by: Confluent Inc.

A .NET Client for Confluent Schema Registry

Confluent.SchemaRegistry.Serdes.Avro by: Confluent Inc.

Provides an Avro Serializer and Deserializer for use with Confluent.Kafka with Confluent Schema Registry integration

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.