让两个互不了解的类在c#中共享事件

我有三个类，一个类在配置文件中加载到内存中供以后访问。我的另一个类是mainform。我想要实现的是，当配置类的某些元素被加载时，它们被添加到GUI (WindowsForm)的列表视图中。

我知道你不能直接从其他非主流类访问GUI，在阅读之后，我不想这样做，所以我一直在尝试触发事件来说"配置更新"，主流将在适当的时候监听和更新列表视图。所以我创建了第三个类来定义事件和委托等，但在我看到的所有例子中，如果不同的类调用事件，它们都被传递给事件类的共享实例。

这是我应该做的事情吗?当我从mainform类创建配置类时，我应该传递事件类的实例吗?或者是否有一种方法可以让两个彼此一无所知的班级共享一个事件?

我修改了下面的microsoft示例来半演示我需要的内容。

    using System;
public class FireEventArgs : EventArgs
{
    public FireEventArgs(string room, int ferocity)
    {
        this.room = room;
        this.ferocity = ferocity;
    }
    public string room;
    public int ferocity;
}
public class FireAlarm
{
    public delegate void FireEventHandler(object sender, FireEventArgs fe);
    public event FireEventHandler FireEvent;
    public void ActivateFireAlarm(string room, int ferocity)
    {
        FireEventArgs fireArgs = new FireEventArgs(room, ferocity);
        if(FireEvent!=null)FireEvent(this, fireArgs);
    }
}
public class FireEventTest
{
    public static void ExtinguishFire(object sender, FireEventArgs fe)
    {
        Console.WriteLine("'nThe ExtinguishFire function was called by {0}.", sender.ToString());
        if (fe.ferocity < 2)
            Console.WriteLine("This fire in the {0} is no problem.  I'm going to pour some water on it.", fe.room);
        else if (fe.ferocity < 5)
            Console.WriteLine("I'm using FireExtinguisher to put out the fire in the {0}.", fe.room);
        else
            Console.WriteLine("The fire in the {0} is out of control.  I'm calling the fire department!", fe.room);
    }
    public static void Main()
    {
        FireAlarm myFireAlarm = new FireAlarm();
        FireAlarm fireAlarm = new FireAlarm();
        fireAlarm.FireEvent += new FireAlarm.FireEventHandler(ExtinguishFire);
        myFireAlarm.ActivateFireAlarm("Kitchen", 3);
        myFireAlarm.ActivateFireAlarm("Study", 1);
        myFireAlarm.ActivateFireAlarm("Porch", 5);
        return;
    }   
}

提前感谢您的帮助。

void FireConfigurationElementLoaded(ConfigurationElement element)