C # Extension methods

a new feature after. NET 3.0, called the extension method extension method, is the ability to "add" methods to an existing type without creating a new derived type, recompiling, or otherwise modifying the original type. An extension method is a special static method, but it can be called just like an instance method on an extended type. Public static bool IsNullOrEmpty (this string s) { return string. IsNullOrEmpty (s); You can then call string A; a.isnullorempty (); External Links

C # Extension methods