PPPoe connection creation in c#

[KARFER]

Hello Everyone, I want to create PPPoE Connection. I do this code but it doesn't work and i use the library DotRas (); When I run the code the error appear in the line:

(RasEntry entry = RasEntry.CreateBroadbandEntry("osama",RasDevice.GetDeviceByName("(PPPoE Osama)",RasDeviceType.PPPoE)); )

and the error is: Value cannot be null.Parameter name: device The is the 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 DotRas;

namespace WindowsFormsApplication2
{

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



    private void button1\_Click(object sender, EventArgs e)
    {
        string path;
        path = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.User);

        using (RasPhoneBook pbk = new RasPhoneBook())
        {
            pbk.Open(path);
            
            RasEntry entry = RasEntry.CreateBroadbandEntry("osama",RasDevice.GetDeviceByName("(PPPoE Osama)",RasDeviceType.PPPoE));
            // Configure any options for your entry here via entry.Options
            pbk.Entries.Add(entry);
        }


        using (RasDialer dialer = new RasDialer()) 
        {
            dialer.EntryName = "Your Entry";
            dialer.PhoneBookPath = path;
            dialer.Credentials = new System.Net.NetworkCredential("User", "Password");
            dialer.Dial();
        }
    }
}

}

If there is another way please tell me how.

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