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

Simulating Virtual Extension Methods

Using Extension Methods to Create Form Extensions - CodeProject

ScottGu's Blog - New Orcas Language Feature: Extension Methods

Harnessing the Power of Extension Methods in C# for Map Calculations, by MuhammedAKBAS

Step by Step Extension Method in C#

DOT NET TRICKS: Internals of Extension Methods

808 – Adding Parameters to an Extension Method

Extension Method In C# (2023) - Code Config

Partially Available Extension Methods in C#

C# Extension Methods