Read from Excel Doc

Question

I am trying to read from a Excel document.  I found a good tutorial at http://www.codeproject.com/KB/office/csharp_excel.aspx .  I don't know why it is not working.  I have added the reference for sure.  I can see it it my solution explorer.  I have added the using Excel line and but it doesn't show up in my autofill while I type.  When I add the next line in the tutorial it says that I have not included the namespace.  Any advice or better tutorials to look at.  I will keep searching in the meantime and thanks.  This is my code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel;
namespace IOListRebel
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Excel.Application excelApp = new Excel.ApplicationClass();
private void button1_Click( object sender, EventArgs e)
{
}
}
}

Mahesh Chand · Answer

Here are some articles with source code:
Accessing Excel Spreadsheet in C# by Mark Bourisaw on Jan 29, 2007
Most of the time you will use SQL, Oracle, Access or some other database to store data. But it is possible to use Excel spreadsheet much like a database to stored data. This article and code will explain how to do this in C#.
How To Open and Read an Excel Spreadsheet into a ListView in .NET by Mike Gold on Aug 29, 2006
The Interoperability services make it very easy to work with COM Capable Applications such as Word and Excel.