using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

    public class EventBusArgs<T> : EventArgs

    {

        private T _value;

        public EventBusArgs(T @value)

        {

            _value = @value;

        }

        public T Value

        {

            get

            {

                return _value;

            }

        }

    }

public enum EventType    {

        None,

        PrintInt1,

        PrintString1,

​

    }

public class EventManager

    {

        private static Dictionary<EventType, EventHandler<EventArgs>> _eventBus;

​

        public  void Awake()

        {

            Awake();

            if (_eventBus == null)

            {

                _eventBus = new Dictionary<EventType, EventHandler<EventArgs>>();

            }

        }

​

        public static void StartListening(EventType eventType, EventHandler<EventArgs> eventHandler)

        {

            if (_eventBus.ContainsKey(eventType))

            {

                _eventBus[eventType] += eventHandler;

            }

            else

            {

                _eventBus.Add(eventType, eventHandler);

            }

        } 

​

        public void Start()

        {

            StartListening(EventType.PrintInt1, PrintInt1);// error here

        }

​

        private void PrintInt1(object sender, EventArgs eventArgs)// because it is not (object sender, EventArgs number)

        {

            EventBusArgs<int> number = (EventBusArgs<int>)eventArgs;

            Debug.Log($"the number in PrintInt1 is {number.Value}");

        }

   }

}