Microsoft® Visual C#® .NET 2003 Kick Start

Creating Objects

To create an object, also called an instance, of a class, you use the new keyword. We've seen how this process works; you can see how we create a new object of the Calculator class in ch03_01.cs, Listing 3.1, and use that object's Addem method to add 2 and 3. Note the parentheses after Calculator in the statement Calculator obj = new Calculator();. These parentheses are necessary when you use the new keyword. They let you pass data to a class's constructor, the special method that lets you initialize the data in a class. We'll go into depth about constructors later in this chapter.

Listing 3.1. Creating a New Class (ch03_01.cs)

class ch03_01 { static void Main() { Calculator obj = new Calculator(); System.Console.WriteLine("2 ...