FileExplorer.MainForm.listBox1_DoubleClick C# (CSharp) Метод

        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            string file = listBox1.SelectedItem as string;
            if (String.IsNullOrEmpty(file))
                return;

            file = Path.Combine(treeView1.SelectedNode.Name, file);

            Process process = Process.Start(@"C:\windows\notepad.exe", file);
            process.WaitForExit();
        }