Top 20 NuGet extensions Packages

A set of utilities
Query helpers and extensions.
Set of C# extension to write cleaner code. Extensions can be use in LinkQ, Rx Extensions and anywhere yo can use an extension. For example: 'if (obj == null)' can be use as 'obj.IfNull(() => .....)' there are tons of unit test samples
A very generic set of extensions to the .NET Framework class library
An assortment of useful extensions to .Net in the following areas, alphabetically: ADO.NET, command line, cryptography, functional programming, logging, generics, performance monitoring, reflection, REST API, serialization, string manipulations.
My .Net Extension Methods
Some useful string extensions for everyday use
A library of fluent utility extensions for System.DateTime
Library of IO extension methods for .Net.
A library of fluent utility extensions for System.Collections types
A collection of useful extensions for expressions in .Net.
A library of commonly used classes and extension for the .NET platform.
Janus Common Extensions Methods on strings, date, arrays, stream, collection, XML, number
CSharp toolkit containing useful extensions and functions.
Various wrappers, extensions, implicit casts and other terrible things to make scriptcs a bit easier.
.Net Framework Extension Library
.NET Core Extensions
Extension methods for .Net classes