C# events system and object sender

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C#

event

Hello,

I've some problems with event system in C#. I'm using code, similar to that:

{
    public delegate void ChangedEventHandler(object sender, EventArgs e);
    class Program
    {
        private static void Main()
        {
            GenEnvent genEvent = new GenEnvent();
            MonitorEvent monEvent = new MonitorEvent(genEvent);
            MonitorEvent monEvent2 = new MonitorEvent(genEvent);
            genEvent.listIt(1);
            Console.ReadLine();
        }
    }
    class GenEnvent
    {
        public event ChangedEventHandler Changed;
        public int i { get; set; }
        protected virtual void OnChange(EventArgs e)
        {
            if (Changed != null)
                Changed(this, e);
        }
        public void listIt(int a) { Console.WriteLine(a); OnChange(EventArgs.Empty); }
    }
    class MonitorEvent
    {
        private GenEnvent genE;
        public MonitorEvent(GenEnvent gene)
        {
            genE = gene;
            gene.Changed += new ChangedEventHandler(workout);
        }
        private void workout(object sender, EventArgs e)
        {
            if (sender == genE)
            {               
                Console.WriteLine("From registered workout {0}", sender.ToString());
            }
        }
    }
}

Question 1: Can i cast object sender to GenEvent? Any links to resources are welcome.
Question 2: How can i check the sender type? For example something like that: if(sender.GetType == GenEvent)?

Thanks.