How to extract file from ZIP archive without the folder using System.IO in c#

Question

In a WinForms project I am trying to extract archive in destination folder, but I not want to extract the folder from archive in destination folder.

I want to extract only the file.

My code:

private void button1_Click(object sender, EventArgs e)
        {

            string Info = "";


            string extractPath = @"D:\dosfiles\SYNOPD\SYNOPD$$.PD\" + comboBox3.SelectedItem.ToString() + @"\" + comboBox2.SelectedItem.ToString() + @"\";
            string zipPath = @"D:\dosfiles\" + comboBox1.SelectedItem.ToString() + "_" + comboBox2.SelectedItem.ToString() + "_" + comboBox3.SelectedItem.ToString() + "S" + ".zip";

            if (!Directory.Exists(extractPath))
            {
                Info += "Folder not exists in D:\\dosfiles\\SYNOPD\\SYNOPD$$.PD\\" + comboBox3.SelectedItem.ToString() + @"\" + comboBox2.SelectedItem.ToString() + @"\" + comboBox1.SelectedItem.ToString();
            }

            else if(Directory.Exists(extractPath))
            {
                if (Directory.Exists(extractPath))
                {
                    Directory.Delete(extractPath, true);
                }
                ZipFile.ExtractToDirectory(zipPath, extractPath);
                Info += "Your synoptic files has been extracted in  D:\\dosfiles\\SYNOPD\\SYNOPD$$.PD\\" + comboBox3.SelectedItem.ToString() + @"\" + comboBox2.SelectedItem.ToString() + @"\" + comboBox1.SelectedItem.ToString() + Environment.NewLine;
            }

            if (Info != "")
            {
                MessageBox.Show(Info);
                Application.Exit();
            }
        }
    }
}