Unity Game Event Message Bus

GameEventMessageBus.cs

using System;
using System.Collections.Generic;

public class GameEventMessageBus
{
    private static Dictionary<Type, List<Action<object>>> _subscriberDict = new Dictionary<Type, List<Action<object>>>();

    public static void Subscribe<T>(Action<T> handler)
    {
        var type = typeof(T);
        InitializeTypeKey(type);
        _subscriberDict[type].Add(new Action<object>(o => handler((T)o)));
    }

    private static void InitializeTypeKey(Type key)
    {
        if (!_subscriberDict.ContainsKey(key))
            _subscriberDict.Add(key, new List<Action<object>>());    
    }


    public static void Emit<T>(T message)
    {
        var type = typeof(T);
        InitializeTypeKey(type);
        foreach(var handler in _subscriberDict[type])
            handler.Invoke(message);
    }
}