FastMember.Signed by: Marc Gravell

In .NET reflection is slow... well, kinda slow. If you need access to the members of an arbitrary type, with the type and member-names known only at runtime - then it is frankly hard (especially for DLR types). This library makes such access easy and fast.

Figgle by: Drew Noakes

ASCII banner generation for .NET

FirebirdSql.Data.FirebirdClient by: FirebirdSQL

Firebird ADO.NET Data provider

Fizzler by: Atif Aziz Colin Ramsay

Fizzler is a W3C Selectors parser and generic selector framework for document hierarchies.

FluentAssertions by: Dennis Doomen Jonas Nyrup Xceed

A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Works with .NET Standard 2.0 and higher, .NET Framework 4.7 and higher and .NET 6 and higher. Supports the unit test frameworks MSTest2, NUnit3, NUnit4, XUnit2, XUnit3, MSpec and TUnit. IMPORTANT: This version is free for open-source projects and non-commercial use, but commercial use requires [a paid license](https://xceed.com/products/unit-testing/fluent-assertions/). Check out the [license page](LICENSE) for more information.

FluentMigrator by: Josh Coffman Tom Marien

FluentMigrator is a database migration framework for .NET written in C#. The basic idea is that you can create migrations which are simply classes that derive from the Migration base class and have a Migration attribute with a unique version number attached to them. Upon executing FluentMigrator, you tell it which version to migrate to and it will run all necessary migrations in order to bring your database up to that version. In addition to forward migration support, FluentMigrator also supports different ways to execute the migrations along with selective migrations called profiles and executing arbitrary SQL.

FluentNHibernate by: James Gregory and contributors

Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate.

FluentValidation by: Jeremy Skinner

A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.

Flurl by: Todd Menier

A fluent, portable URL builder. To make HTTP calls off the fluent chain, check out Flurl.Http.

Fluxor.Blazor.Web by: Peter Morris

A zero boilerplate Redux/Flux framework for Blazor

Fody by: The Fody Team

Extensible tool for weaving .net assemblies.

Fractions by: Daniel Mueller

The fraction data type consists of two BigInteger values for numerator and denominator. It implements various operations (addition, subtraction, multiplication, division and remainder) with operator overloads.

FubarCoder.RestSharp.Portable.Core by: Mark Junker Fubar Development Junker

This is the core RestSharp.Portable library which contains mostly interfaces to allow dependent libraries to use as few dependencies as possible. Supported Platforms: - .NET Standard 1.0 - .NET Framework 4 - Silverlight 5 - Portable Class Libraries (Profiles 259 and 328)

FubarCoder.RestSharp.Portable.HttpClient by: Mark Junker Fubar Development Junker

Some kind of a RestSharp port to PCL. This is not related to the RestSharp project at all! Supported Platforms: - .NET Standard 1.1 - .NET Framework 4 - Silverlight 5 - Portable Class Libraries (Profiles 259 and 328)

GeoAPI by: NetTopologySuite Team

GeoAPI.NET project provides a common framework based on OGC/ISO standards to improve interoperability among .NET GIS projects.

GeoAPI.CoordinateSystems by: NetTopologySuite Team

GeoAPI.NET project provides a common framework based on OGC/ISO standards to improve interoperability among .NET GIS projects.

GeoAPI.Core by: NetTopologySuite Team and Fabrício Godoy

GeoAPI.NET project provides a common framework based on OGC/ISO standards to improve interoperability among .NET GIS projects.

Google.Api.Gax by: Google Inc.

Support classes for Google API client libraries

Google.Api.Gax.Rest by: Google Inc.

Common Protocol Buffer messages for Google APIs

Google.Apis by: Google LLC

The Google APIs Client Library is a runtime client for working with Google services. The library supports service requests, media upload and download, etc. Supported Platforms: - .NET Framework 4.5+ - NetStandard1.3, providing .NET Core support