class NotifyPropertyChanged : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void RaisePropertyChanged()
    {
        var frames = new StackTrace();
        for (var i = 0; i < frames.FrameCount; i++)
        {
            var frame = frames.GetFrame(i).GetMethod() as MethodInfo;
            if (frame != null)
            {
                if (frame.IsSpecialName && frame.Name.StartsWith("set_"))
                {
                    RaisePropertyChanged(frame.Name.Substring(4));
                    return;
                }
            }
        }
        throw new InvalidOperationException("NotifyPropertyChanged() can only by invoked within a property setter.");
    }

    protected void RaisePropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this.PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

class Notifier : NotifyPropertyChanged
{
    string _name1 = "";
    public string Name1
    {
        get
        {
            return _name1;
        }
        [MethodImpl(MethodImplOptions.NoInlining)]
        set
        {
            _name1 = value;
            RaisePropertyChanged();
        }
    }

    string _name2 = "";
    public string Name2
    {
        get
        {
            return _name2;
        }
        set
        {
            _name2 = value;
            RaisePropertyChanged("Name2");
        }
    }
}

public static void Main()
{
    const int N = 1000;

    var x = new Notifier();

    Console.WriteLine("Verifying that this will even work...");

    PropertyChangedEventHandler handler = (sender, e) => { Console.WriteLine(e.PropertyName); };
    x.PropertyChanged += handler;

    x.Name1 = "Test Name1 value";
    x.Name2 = "Test Name2 value";

    x.PropertyChanged -= handler;

    Console.WriteLine("Done. Press Enter to begin.");
    Console.ReadLine();

    var sw = Stopwatch.StartNew();
    for (int i = 0; i < N; ++i)
    {
        x.Name1 = "Whatever";
    }
    sw.Stop();

    TimeSpan elapsed1 = sw.Elapsed;

    Console.WriteLine("Raised event using reflection {0} times in {1} ms.", N, elapsed1.TotalMilliseconds);

    sw = Stopwatch.StartNew();
    for (int i = 0; i < N; ++i)
    {
        x.Name2 = "Whatever";
    }
    sw.Stop();

    TimeSpan elapsed2 = sw.Elapsed;

    Console.WriteLine("Raised event WITHOUT reflection {0} times in {1} ms.", N, elapsed2.TotalMilliseconds);
}