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)

{

}

}

}