Castle.Windsor by: Castle Project Contributors

Castle Windsor is best of breed, mature Inversion of Control container available for .NET.

ClosedXML by: Jan Havlíček, Francois Botha, Aleksei Pankratev, Manuel de Leon, Amir Ghezelbash

See release notes https://github.com/ClosedXML/ClosedXML/releases/tag/0.105.0 ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.

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.

Cloudmersive.APIClient.NETCore.VirusScan by: Cloudmersive

Virus Scan API lets you scan files and content for viruses and identify security issues with content.

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.Maui by: Microsoft

The .NET MAUI Community Toolkit is a collection of Animations, Behaviors, Converters, and Custom Views for development with .NET MAUI. It simplifies and demonstrates common developer tasks building iOS, Android, macOS and Windows apps with .NET MAUI.

CommunityToolkit.Maui.Core by: Microsoft

Core library for community toolkits using .NET MAUI

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.

CompareNETObjects by: gfinzer

What you have been waiting for. Perform a deep compare of any two .NET objects using reflection. Shows the differences between the two objects.

CookieInformation.Episerver by: Cookie Information

An integration to Cookie Informations Consent solution. Helps you collect visitors Cookie Consents and comply with GDPR and ePrivacy

Coravel by: James Hickey

Near-zero config .NET Core library that makes Task Scheduling, Caching, Queuing, Mailing, Event Broadcasting (and more) a breeze!

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.

coverlet.msbuild by: tonerdo

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

CSharpier by: CSharpier

CSharpier is an opinionated code formatter for c#.

csharp-ls by: Saulius Menkevičius

C# LSP language server

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.

Cube.Core by: clown, cube-soft

Basic components to practice the MVVM pattern in application development.

Cube.Native.Pdfium.Lite by: clown, cube-soft, PDFium Authors

PDFium library without V8 and XFA modules.