Something related to a counter and opening files...

CounterCodeForOmar.cs

using System;
using System.IO; 
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace OpenFileCounter
{
    public partial class Form1 : Form
    {
        int counter = 0; 
        OpenFileDialog ofd = new OpenFileDialog(); 

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if ((ofd.ShowDialog() == DialogResult.OK) && (ofd.OpenFile() != null))
                textBox1.Text = Path.GetFileName(ofd.FileName);
            
            //for each file opened, add 1 to the counter
            foreach (string file in ofd.FileNames)
            {
                counter++;
                label1.Text = counter.ToString();
            }
        }
    }
}

CounterCodeForOmar.vb

Imports System.IO

Public Class Form1
    Dim counter As Integer = 0
    Dim ofd As New OpenFileDialog()
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If ofd.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
            TextBox1.Text = Path.GetFileName(ofd.FileName)
        End If

        For Each file As String In ofd.FileNames
            counter += 1
            Label1.Text = counter.ToString()
        Next
    End Sub
End Class