void IObserver <DiagnosticListener> .OnNext(DiagnosticListener listener)
{
foreach (var subscriber in _diagnosticObservers)
{
IDisposable subscription = subscriber.SubscribeIfMatch(listener);
if (subscription != null)
{
if (Log.IsEnabled(LogEventLevel.Verbose))
{
Log.Verbose(
"Subscriber '{0}' returned subscription for '{1}'",
subscriber.GetType().Name,
listener.Name);
}
_subscriptions.Add(subscription);
}
}
}