public static IObservable <PropertyChangedEventArgs> ObservePropertyChangedSlim(this INotifyPropertyChanged source, string name, bool signalInitial = true)
{
Ensure.NotNull(source, nameof(source));
Ensure.NotNullOrEmpty(name, "name");
if (source.GetType().GetProperty(name) == null)
{
throw new ArgumentException($"The type {source.GetType()} does not have a property named {name}", name);
}
var observable = source.ObservePropertyChangedSlim()
.Where(e => IsPropertyName(e, name));
if (signalInitial)
{
observable = observable.StartWith(new PropertyChangedEventArgs(name));
}
return(observable);
}
