Thanks to Josh Smith for pointing out a couple of good thoughts on supporting INotifyPropertyChanged in a base class.

• Cache PropertyChangedEventArgs so there's only one per property name
• Verify property name (in debug mode) since it's just a string - in case dev fat fingered the name (of course dev should be using code snippets to create the property, right?)
• Do some setter post processing
  

A base class which implements INotifyPropertyChanged � Josh Smith on WPF