FirebirdSql.Data.FirebirdClient by: FirebirdSQL

Firebird ADO.NET Data provider

Fleck by: statenjason

C# WebSocket Implementation

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.

FluentNHibernate by: James Gregory and contributors

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

FluentScheduler by: Jim Geurts <jim@biacreations.com> Talles L <talleslasmar@gmail.com> & further contributors

Automated job scheduler with fluent interface.

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.

Fody by: The Fody Team

Extensible tool for weaving .net assemblies.

FParsec by: Stephan Tolksdorf (FParsec) panesofglass and khanzor (NuGet Package)

FParsec is a parser combinator library for F#.

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.

FreeRedis by: FreeRedis

FreeRedis is .NET redis client, supports cluster, sentinel, master-slave, pipeline, transaction and connection pool.

FreeSql by: FreeSql ncc YeXiangQin

FreeSql is the ORM in .NetCore, .NetFramework, And Xamarin. It supports Mysql, Postgresql, SqlServer, Oracle, Sqlite, Firebird, Clickhouse, DuckDB, TDengine, QuestDB, Odbc, Oledb, 达梦, 人大金仓, 南大通用, 虚谷, 神舟通用, 翰高, And Access

FreeSql.DbContext by: FreeSql ncc YeXiangQin

FreeSql is the ORM in .NetCore, .NetFramework, And Xamarin. It supports Mysql, Postgresql, SqlServer, Oracle, Sqlite, Firebird, Clickhouse, DuckDB, TDengine, QuestDB, Odbc, Oledb, 达梦, 人大金仓, 南大通用, 虚谷, 神舟通用, 翰高, And Access

FreeSql.Provider.Dameng by: FreeSql ncc YeXiangQin

FreeSql 数据库实现，基于 达梦数据库 Ado.net (DmProvider)

FreeSql.Provider.MySql by: FreeSql ncc YeXiangQin

FreeSql 数据库实现，基于 MySql 5.6，Ado.Net 驱动是 MySql.Data（Oracle官方）

FreeSql.Provider.Oracle by: FreeSql ncc YeXiangQin

FreeSql 数据库实现，基于 Oracle 11

FreeSql.Provider.ShenTong by: FreeSql ncc YeXiangQin

FreeSql 数据库实现，基于 神舟通用数据库 7.0.8

FreeSql.Provider.Sqlite by: FreeSql ncc YeXiangQin

FreeSql 数据库实现，基于 Sqlite 3.0，支持 .NetCore、.NetFramework、Xamarin

FreeSql.Provider.SqlServer by: FreeSql ncc YeXiangQin

FreeSql 数据库实现，基于 SqlServer 2005+，并根据版本适配分页方法：row_number 或 offset fetch next

FreeSql.Repository by: FreeSql ncc YeXiangQin

FreeSql Implementation of General Repository, Support MySql/SqlServer/PostgreSQL/Oracle/Sqlite/Firebird/Clickhouse/DuckDB/TDengine/QuestDB/达梦/人大金仓/南大通用/虚谷/神舟通用/翰高/Access, and read/write separation、and split table.