View difference between Paste ID: MbHjxhRy and

-
+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);
 }