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// Display a simple message to the user.

Console.WriteLine("***** My First C# App *****");

Console.WriteLine("Hello World!");

Console.WriteLine();

// Wait for Enter key to be pressed before shutting down.

Console.ReadLine();

}

}

Here, we have a definition for a class type that supports a single method named Main(). By

default, Visual Studio 2008 names the class defining Main() “Program”; however, you are free to

change this if you so choose. Every executable C# application (console program, Windows desktop

program, or Windows service) must contain a class defining a Main() method, which is used to sig-

nify the entry point of the application.

Formally speaking, the class that defines the Main() method is termed the application object.

While it is possible for a single executable application to have more than one application object

(which can be useful when performing unit tests), you must inform the compiler which Main()

method should be used as the entry point via the /main option of the command-line compiler.

Note that the signature of Main() is adorned with the static keyword, which will be examined

in detail in Chapter 5. For the time being, simply understand that static members are scoped to the

class level (rather than the object level) and can thus be invoked without the need to first create a

new class instance.