Explicitly using an extension method
Extension methods can only see public or internal members of the extended class
Extension methods for chaining
Extension methods with Enumeration
Extension methods dispatch based on static type
Extension methods on Interfaces
Extension methods arent supported by dynamic code
Extension methods in combination with interfaces
Extensions and interfaces together enable DRY code and mixin-like functionality
IListT Extension Method Example Comparing 2 Lists
Extension methods as strongly typed wrappers
Using Extension methods to create mapper classes
Using Extension methods to build new collection types e.g. DictList