Hour 3. Understanding Objects and Collections

So far, you've gotten an introduction to programming in C# by building a Picture Viewer project. You spent the previous hour digging into the IDE and learning skills critical to your success with C#. In this hour, you're going to start learning about some important programming concepts, namely objects.

The term object, as it relates to programming, may have been new to you prior to this book. The more you work with C#, the more you'll hear about objects. C# is a true object-oriented language. This hour isn't going to discuss object-oriented programming in any detail, because object-oriented programming is a very complex subject and is well beyond the scope of this book. Instead, you'll learn about objects in a more general sense. Everything you use in C# is an object, so understanding this material is critical to your success with C#. Forms are objects, for example, as are the controls you place on a form. Pretty much every element of a C# project is an object and belongs to a collection of objects. All objects have attributes (called properties), most have methods , and many have events. Whether creating simple applications or building large-scale enterprise solutions, you must understand what an object is and how it works. In this hour, you'll learn what makes an object an object, and you'll learn about collections.

The highlights of this hour include the following:

Understanding objects
Getting and setting properties
Triggering methods
Understanding method dynamism
Writing object-based code
Understanding collections
Using the Object Browser

If you've listened to the programming press at all, you've probably heard the term object oriented, and perhaps words such as polymorphism, encapsulation, and inheritance. In truth, these object-oriented features of C# are very exciting, but they're far beyond Hour 3. You'll learn a little about object-oriented programming in this book, but if you're really interested in taking your programming skills to the next level, you should buy a book dedicated to the subject after you've completed this one.

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