C＃状态机状态更改委托

Question

我一直在尝试构建自己的通用状态机，但我想不出一种将状态更改与事件联系起来的方法。

目前，我的通用实现如下：

public interface IStateRoot
{

}
public interface IState<T> where T: IStateRoot
{

}

public abstract class State<T> : IState<T> where T: IStateRoot
{
    public delegate void OnChange(IState<T> state);
    OnChange OnStateChange;

    public void Invoke()
    {
        OnStateChange?.Invoke(this);
    }
}
public class FSM<T> where T: IStateRoot
{
    public delegate void TransitionDelegate<K>(IState<K> state) where K: T;
    public Dictionary<Type, TransitionDelegate<T>> Transitions;
    public State<T> State { get; set; }
    public FSM()
    {
        Transitions = new Dictionary<Type, TransitionDelegate<T>>();
    }
    public FSM(State<T> init)
    {
        Transition(init);
    }

    public void Transition<K>(K nextState) where K : State<T>
    {
        if (Transitions.TryGetValue(typeof(K), out var value))
        {
            value?.Invoke(nextState);
        }
        State = nextState;
    }

    public void OnTransition<K>(State<K>.OnChange action) where K : T
    {
        if (Transitions.TryGetValue(typeof(K), out var value))
        {
            value += action;
            return;
        }

        Transitions.Add(typeof(K), action);
    }

}

在一个完美的世界中，我希望能够像这样创建自己的StateRoot和他的States

 public class MyState : IStateRoot
{
    public class InitState : State<MyState> { }

    public class EndState : State<MyState> { }

}

然后像这样使用它

 public class StateListener
{
    public FSM<MyState> StateMachine;

    public StateListener()
    {
        StateMachine = new FSM<MyState>();
        StateMachine.OnTransition<MyState.InitState>(OnInit);
        StateMachine.OnTransition<MyState.EndState>(OnEndState);
        StateMachine.Transition(new MyState.InitState());
    }

    public void OnEndState(MyState.EndState state)
    {
        Console.WriteLine("EndState");
    } 

    public void OnInit(MyState.InitState state)
    {
        Console.WriteLine("StartState");
    }
}

我在将通用方法挂接到OnTransition时遇到问题。

我遇到的问题是我无法在OnTransitionMethod中从State<K>.OnChange转换为FSM<T>.TransitionDelegate<K>。我不知道该怎么办。