右键单击任何文件时获取文件路径

Question

尝试使用此代码获取所选文件的文件路径，同时右键单击 但我收到错误“找不到文件”我很困惑，把％1 请帮助我谢谢！

RegistryKey rKey = Registry.ClassesRoot.OpenSubKey(@"Directory\shell", true);
        String[] names = rKey.GetSubKeyNames();
        foreach (String s in names)
        {
            System.Windows.Forms.MessageBox.Show(s);
        }
        RegistryKey newKey = rKey.CreateSubKey("open");
        RegistryKey newSubKey = newKey.CreateSubKey("command");
        newSubKey.SetValue("%1",@"C:\Users\system\Documents\Visual Studio 2010\Projects\dg\dg\bin\Debug\dg.exe");
        newSubKey.Close();
        newKey.Close();
        rKey.Close();
  static void Main(string[] args)
    {
         if (args.Length > 0)
        {
            folderpath = args[0];