static void Main()
{
DataSource source1 = new DataSource("Source 1"),
source2 = new DataSource("Source 2");
DataListener listener1 = new DataListener("Listener 1"),
listener2 = new DataListener("Listener 2");
listener1.Subscribe(source1);
listener2.Subscribe(source2);
// now we'll release one source and one listener, and force a collect
source1 = null;
listener2 = null;
GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
GC.WaitForPendingFinalizers(); // source 1 gets collected, ONLY
Console.WriteLine("Done");
Console.ReadLine();
GC.KeepAlive(source2); // prevents collection due to optimisation
GC.KeepAlive(listener1); // prevents collection due to optimisation
}
