public class DisengagedState : State
{
    protected override void OnEntry(StateHandlerInfo<State> info)
    {
        Console.WriteLine("Entering Disengaged State");
        //TODO : Cancel All Orders
        base.OnEntry(info);
    }

    protected override void OnExit(StateHandlerInfo<State> info)
    {
        Console.WriteLine("Exiting Disengaged State");
        base.OnExit(info);
    }
}

public class EngagedState : State
{
    protected override void OnEntry(StateHandlerInfo<State> info)
    {
        Console.WriteLine("Entering Engaged State");
        base.OnEntry(info);
    }

    protected override void OnExit(StateHandlerInfo<State> info)
    {
        Console.WriteLine("Exiting Engaged State");
        base.OnExit(info);
    }

    protected override State HandleEvent(IEvent @event, object data)
    {
        // Can force transition to a particular state, like a dynamic transition

        return null;
    }
}

public class TradingRig
{
    StateMachine FSM;

    Event EngageEvent = new Event("Engage");
    Event DisengageEvent = new Event("Disengage");

    public void BuildStateMachine()
    {
        FSM = new StateMachine("Trading Rig");
        var disengagedState = FSM.CreateInitialState<DisengagedState>("Disengaged");
        var engagedState = FSM.CreateState<EngagedState>("Engaged");
        disengagedState.TransitionOn(EngageEvent).To(engagedState);
        engagedState.TransitionOn(DisengageEvent).To(disengagedState);
    }

    public void Engage()
    {
        EngageEvent.Fire();
    }

    public void Disengage()
    {
        DisengageEvent.Fire();
    }

}


void Main()
{
    TradingRig Rig = new TradingRig();
    Rig.BuildStateMachine();
    Rig.Engage();
    Rig.Disengage();
}