How to work with extension methods in C#

Extension methods can be used to inject new functionality to a type without needing to modify, derive, or recompile the original type

Exploring Extension Methods in C#

Create And Use An Extension Method In C#

Working With Extension Methods in C#

c# - Why can't I call an extension method from a base class of the extended type‏? - Stack Overflow

Partially Available Extension Methods in C#

Adding Extension Methods To Every Object in C#

Using Extension Methods in C# to Build Fluent Code - Kill All Defects

How extension method works in .Net

C# — Implementing some C# Interfaces and Extension Methods, by GM Fuster, Nerd For Tech

C# Extension Methods - Dot Net Guide

C# Tip: Use extension methods to access a random index from any array! : r/Unity3D

C# String Extensions - CodeProject