Help me, please, with source code C# Bluetooth program

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C#

Bluetooth

I write a program on C#, i need to automatically send files from my PC/Laptop to all turned on bluetooth devices in area. So i cant understand how can i do automatically finding for devices and automatically sending them all my file, ofc they need to confirm it on their side. So here is an example of my program, it can find device and send a file by hand. Help me, please, or send me a link where i can find solution.

using InTheHand.Net;
using InTheHand.Net.Sockets;
using InTheHand.Net.Bluetooth;
using InTheHand.Windows.Forms;
using InTheHand.Net.Ports;
using System.Threading;

namespace Bluetooth
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        InTheHand.Net.BluetoothAddress[] address_array = new BluetoothAddress[1000];
        private Thread thrSend; 
        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void label3_Click(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            InTheHand.Net.Sockets.BluetoothClient bc = new InTheHand.Net.Sockets.BluetoothClient();

            InTheHand.Net.Sockets.BluetoothDeviceInfo[] array = bc.DiscoverDevices();
            for (int i = 0; i < array.Length; i++)
            {
                this.address_array[i] = array[i].DeviceAddress;
                this.lstDevices.Items.Add(array[i].DeviceName);
            }
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (this.lstDevices.SelectedIndex == -1)
            {
                MessageBox.Show("Please select a device.");
                return;
            }
            int index = this.lstDevices.SelectedIndex;
            string mac = this.address_array[index].ToString();
            string nap = this.address_array[index].Nap.ToString();
            string sap = this.address_array[index].Sap.ToString();
            MAC.Text = "MAC : " + mac.ToString();
            NAP.Text = "NAP :" + nap.ToString();
            SAP.Text = "SAP :" + sap.ToString();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.thrSend = new Thread(new ThreadStart(sendfile));
            this.thrSend.Start();

        }
        private void sendfile()
        {
            SelectBluetoothDeviceDialog dialog = new SelectBluetoothDeviceDialog();
            dialog.ShowAuthenticated = true;
            dialog.ShowRemembered = true;
            dialog.ShowUnknown = true;
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Title = "Select File";
            ofd.Filter = "All Files (*.*)|.*";
            if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    Cursor.Current = Cursors.WaitCursor;
                    System.Uri uri = new Uri("obex://" + dialog.SelectedDevice.ToString() + "/" + ofd.FileName);
                    ObexWebRequest request = new ObexWebRequest(uri);
                    request.ReadFile(ofd.FileName);
                    ObexWebResponse response = (ObexWebResponse)request.GetResponse();
                    MessageBox.Show(response.StatusCode.ToString());
                    response.Close();
                    Cursor.Current = Cursors.Default;
                }
                else
                {
                    MessageBox.Show("File Not Selected");
                }
            }
            else
            {
                MessageBox.Show("Device Not Selected");
            }
        }
    }
}