public static class StateHelper
    {
        public static TStateClass CreateState<TStateClass, TStateValue>(TStateValue stateValue)
            where TStateClass : State<TStateValue> where TStateValue : struct, IComparable
        {
            var state = typeof(TStateClass).GetConcreteChild(Enum.GetName(typeof(TStateValue), stateValue));
            return (TStateClass)Activator.CreateInstance(state);
        }
    }