patsissons

namespace Test
{
    public static class INotifyPropertyChangedExtensions
    {
        public static IObservable<EventPattern<PropertyChangedEventArgs>> FromPropertyChangedPattern(this INotifyPropertyChanged source)
        {
            return Observable.FromEventPattern<PropertyChangedEventHandler, PropertyChangedEventArgs>(
                x => source.PropertyChanged += x,
                x => source.PropertyChanged -= x);
        }