class Carriage
{
// Fields
  private bool m_isReleased = true;
// Constructors
  public Carriage() {}
// Methods
  public bool Release() { m_isReleased = true; return true; }
  public bool Remove() { m_isReleased = false; return true; }
}

//------------------------------------
class Casament
{
// Fields
  private string m_position = "";
  private bool m_isReleased = true;
// Constructors
  public Casament( string position ) { m_position = position; }
// Methods
  public bool Release() { m_isReleased = true; return true; }
  public bool Remove() { m_isReleased = false; return true; }
}


//------------------------------------
// "Facade"
class Gear
{
// Fields
  private string m_position;
  private bool m_isReleased;

   private Casament l_casament = new Casament("left");
  private Casament r_casament = new Casament("right");
  private Carriage carriage = new Carriage();

// Constructors
  public Gear( string position )
{
  m_position = position;
  m_isReleased = true;
}

// Methods
  public bool Release()
  {
    if (m_isReleased) return true;
    if( !l_casament.Release() ) return false;
    if( !l_casament.Release() ) return false;
    if( !carriage.Release() ) return false;
    m_isReleased = true;
    return true;
  }
  public bool Remove()
  {
    if (!m_isReleased) return true;
    if( !l_casament.Remove() ) return false;
    if( !l_casament.Remove() ) return false;
    if( !carriage.Remove() ) return false;
    m_isReleased = false;
    return true;
  }

//------------------------------------
class FasadeApplication
{
[STAThread]
  static void Main(string[] args)
  {
// Create Facade
  Gear gear = new Gear( "front" );
  if (gear.Remove())
    Console.WriteLine("Gear removed successfully.");
  else
    Console.WriteLine("Warning! Error during gear removing.");

  if (gear.Release())
    Console.WriteLine("Gear released successfully.");
  else
    Console.WriteLine("Warning! Error during gear releasing.");

  Console.Read();
}
}
}