display urls one by one in webbrowser in C#

Dear sir ,

 

I faced an issue to open urls  one by one from text file in webbrowser in windows application,

although every time ony one url is display in web browser.

so plz help me where is problems arises.

 

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 System.IO;

namespace demotimer
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}


private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
//WebBrowser wb = sender as WebBrowser;
FileStream fs = new FileStream("D:/Pawan_R&D/timer/demotimer/urls.txt", FileMode.Open, FileAccess.Read);
//StreamReader sr = new StreamReader(fs);
// webBrowser1.Navigate(sr);
//webBrowser1.ScriptErrorsSuppressed = true;
int counter = 0;
string line;
System.IO.StreamReader file =new System.IO.StreamReader("D:/Pawan_R&D/timer/demotimer/urls.txt");
List list=new List();
try
{
webBrowser1.ScriptErrorsSuppressed = true;
while ((line = file.ReadLine()) != null)
{
//Console.WriteLine(line);
// webBrowser1.Navigate(line);
list.Add(line);
counter++;
}
string[] arr = list.ToArray();
Array.Sort(arr);
int i = 0;
for (i = 0; i < 5; i++)
{
webBrowser1.Navigate(arr[i]);

}
file.Close();
//Console.ReadLine();

//foreach (string url in File.ReadAllLines("D:/Pawan_R&D/timer/demotimer/urls.txt"))
//{

// webBrowser1.Navigate(url);
// counter++;

//}
}
catch (Exception)
{
MessageBox.Show("Internet Connection not found", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
//this.Close();
}
}

private void Form1_Load(object sender, EventArgs e)
{
WebBrowser wb = new WebBrowser();
webBrowser1.ScriptErrorsSuppressed = true;
wb.AllowNavigation = true;
wb.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
// wb.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser2_DocumentCompleted);
// wb.Navigate("http://www.google.com");
//timer1.Start();

}
// private void timer1_Tick(object sender, EventArgs e)
//{
//timer1.Interval = 5000;//5 sec
// timer1.Tick += new System.EventHandler(timer1_Tick);
// webBrowser1.Refresh();

//}



}
}