The IComparable interface lets you create objects that know how to sort themselves correctly. This interface also provides an example of a high-level strategy for building and extending your classes.

Here's the simplest possible code for creating a custom collection class in the Microsoft .NET Framework that includes support for For…Each loops, an indexer method and initializing collections with { ...

Java interfaces are different from classes, and it’s important to know how to use their special properties in your Java programs. This tutorial introduces the difference between classes and interfaces ...