
        private void button3_Click(object sender, EventArgs e)
        {
            listBox1.Items.Clear();
            if (textBox1.Text != "")
            {
                listBox1.Show();
                if (Directory.Exists(textBox1.Text))
                {
                    string[] subDir = Directory.GetDirectories(textBox1.Text);
                    foreach (string dir in subDir)
                    {
                        listBox1.Items.Add(dir);
                    }
                }
                else
                    MessageBox.Show("Directory not exists");
            }
            else
                MessageBox.Show("Please enter directory name in  textBox1");
		

        }

     
