C#

private VehicleClass Vehicle = new VehicleClass();
public MainForm()
{
  txtIgnitionStatus.DataBindings.Add(new Binding("Text", this.Vehicle, "Ignition"));
}

public static void SetIgnition(object obj)
{
  VehicleClass vehicle = obj as VehicleClass;

  // receives tcp packet from a NetworkStream here
  // stores tcp packet data as string in "dataString"

  switch(dataString)
  {
    case "ON":
      vehicle.Ignition = true;
      break;

    case "OFF":
      vehicle.Ignition = false;
      break;

    default:
      vehicle.Ignition = false;
      break;
  }
..
}

readThread = new Thread(new ParameterizedThreadStart(VehicleClass.SetIgnition));
readThread.Start(this);

Cross-thread operation not valid: Control 'txtIgnitionStatus' accessed from a thread other than the thread it was created on.

public IAsyncResult BeginInvoke(Delegate method, object[] args)
{
  throw new NotImplementedException();
}

public object EndInvoke(IAsyncResult result)
{
  throw new NotImplementedException();
}

public object Invoke(Delegate method, object[] args)
{
  throw new NotImplementedException();
}

public bool InvokeRequired
{
  get { throw new NotImplementedException(); }
}