Creating Your First Console Application

A Simple C# Program

Here's Your first code, it will ask your name and display it in console. Let's take a look to the code:

using System;
namespace Program1
{
 public class Program
 {
  // This is where your program starts.
  static void Main(string[] args)
  {
   // Prompt user to enter a name.
   Console.WriteLine(“Enter your name, please:”);

   // Now read the name entered.
   string name = Console.ReadLine();

   // Greet the user with the name that was entered.
   Console.WriteLine(“Hello, “ + name);

   // Wait for user to acknowledge the results.
   Console.WriteLine(“Press Enter to terminate...”);
   Console.Read();
  }
 }
}

When you compile and run the code, it will show:

Enter your name, please:
Yang Sopiana
Hello, Yang Sopiana
Press Enter to terminate...

More About Simple Program

To compile the program, you can use Visual Studio or the command-line compiler. To use the command-line compiler, in its simplest form, use the following command in a command window:

csc SimpleProgram.cs

Now lets see how your code works:

line 1:	using directive was used to make the System namespace available to our application, so we can use the Console class
line 2:	namespace Program1 It creates a new namespace called Program1, namespace is a set of type declarations associated with a name.
line 4:	public class Program This is our program class name.
line 6:	It's a comment, compiler will ignore all character after comments tag ('//')
line 7:	static void Main is our main method. A program should have main method, where the application execution starts from.
line 10:	Console.WriteLine tell system to print some character inside the function.
line 13:	string name = Console.ReadLine(); tell application to provide some memory (called variable) to store console input from user.
line 16:	Console.WriteLine("Hello, " + name); the console will write "Hello, " and display 'name' variable.

Where can I get C# Compiler

Visual C# Express Edition has all the features you’ll need for the examples in this tutorial, and it has the additional advantage of being completely free from Microsoft. Getting C# Express is very simple, just go link below and download Visual C# Express:
http://www.microsoft.com/express/download/
You can also download MSDN Library that contains useful help files in case you need.

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