Csharp/CSharp Tutorial/Language Basics/Intrduction

A C# program begins with a call to Main()

This is a simple C# program.

Call this program Example.cs.

<source lang="csharp">using System;

class MainClass {

 public static void Main() { 
   Console.WriteLine("A simple C# program."); 
 } 

}</source>

A simple C# program.

C# has the following reserved keywords:

<source lang="csharp">abstract as base bool break byte case catch char checked class const continue decimal default delegate do double else enum event explicit extern false finally fixed float for foreach goto if Implicit In Int Interface Internal Is lock long namespace new null object operator out override params private protected public readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using virtual void volatile while</source>

The C# Keywords

<source lang="csharp">abstract as base bool break Byte case catch char checked class const continue decimal default delegate do double else enum event explicit extern false finally fixed float for foreach goto if implicit in int interface internal is lock long namespace new null object operator out override params private protected public readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using virtual volatile void while</source>

Using csc.exe, the C# Command-Line Compiler

To create and run programs using the C# command-line compiler:

1. Enter the program using a text editor.
2. Compile the program.
3. Run the program.

Compiling the Program

C:\>csc Example.cs

Prior to running csc.exe, you may need to run the batch file vcvars32.bat, which is typically found in the //Program Files/Microsoft Visual Studio.NET/Vc7/Bin directory.

1. The name of a C# program is arbitrary
2. By convention, C# programs use the .cs file extension

1.1.Intrduction 1.1.1. <A href="/Tutorial/CSharp/0020__Language-Basics/ACprogrambeginswithacalltoMain.htm">A C# program begins with a call to Main()</a> 1.1.2. Using csc.exe, the C# Command-Line Compiler 1.1.3. <A href="/Tutorial/CSharp/0020__Language-Basics/TheCKeywords.htm">The C# Keywords </a> 1.1.4. <A href="/Tutorial/CSharp/0020__Language-Basics/Chasthefollowingreservedkeywords.htm">C# has the following reserved keywords:</a>