static void ViolatesContract()
{
var observable = new MyContractViolatingRangeObservable(5, 8);
var observer = new MyObserver <int>();
var subscription = observable.Subscribe(observer);
Console.WriteLine("Press any key to dispose the subscription.");
Console.ReadKey();
subscription.Dispose();
}
static void ObserverBaseMitigatesContractViolation1()
{
var observable = new MyContractViolatingRangeObservable(5, 8);
var subscription = observable.Subscribe(
Console.WriteLine,
ex => Console.WriteLine(ex.Message),
() => Console.WriteLine("Completed."));
Console.WriteLine("Press any key to dispose the subscription.");
Console.ReadKey();
subscription.Dispose();
}