Like SendMessage but with as many aparams as you want!

BetterSendMessages.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.Linq;

public static class Extensions
{
    public static void BetterSendMessage(this Component obj, string function, params object[] args)
    {
        MessageComponenets(obj.GetComponents<Component>(), function, args);
    }

    public static void BetterBroadcastMessage(this Component obj, string function, params object[] args)
    {
        MessageComponenets(obj.GetComponentsInChildren<Component>(), function, args);
    }

    public static void BetterSendMessageUpwards(this Component obj, string function, params object[] args)
    {
        MessageComponenets(obj.GetComponentsInParent<Component>(), function, args);
    }

    private static void MessageComponenets(Component[] components, string function, params object[] args)
    {
        foreach (Component c in components)
        {
            MethodInfo methodInfo = c.GetType().GetMethods().SingleOrDefault<MethodInfo>(x => x.Name == function && x.GetParameters().Length == args.Length);
            if (methodInfo != null)
                methodInfo.Invoke(c, args);
        }
    }
}