C# Code to read excel book

C# code to read excel document.

using System.Collections; using Microsoft.Office.Interop.Excel; using System; using System.Reflection; class Sample {     static void Main()     {         string file = @"c:\csnet\jap\ex1\sample1.xlsx";         Microsoft.Office.Interop.Excel.ApplicationClass ap = new ApplicationClass();         Missing m=Missing.Value;        Workbook wb=ap.Workbooks.Open(file, m, m, m, m, m, m, m, m, m, m, m, m, m, m);        Worksheet sh =(Worksheet) wb.Sheets[1];        for (int i = 1; i < 10; i++)        {            for(int j=1;j<=3;j++)            {                Range r =(Range) sh.Cells[i, j];                Console.Write(r.Value2);            }            Console.WriteLine();        }         ap.Quit();            } }