Using Events to notify and change a property i.e. button.color

[KGCybeX]

Good day all

I have been going through tutorials from youtube and msdn pages to forums explaining events and how they work.

I have had no luck, so I will be asking a situation specific question and hopefully someone could get through to me, this is hopefully a simple enough example and a problem I need to implement into a project of mine.

I have always found ways around events since I never fully understood it, but now I have no choice!

public class tcp_sender
    {

        //for testing 
        static bool ServerOnline = false;

        void THREAD_CheckServer
        {
            ServerOnline = (Ping == success);
        }
}

tcp_listener
{
        //button.color = ((ServerOnline) ? Color.Green : Color.Red);
}