The idea of constrained properties in Java is not new. Since JDK 1.1, a legion of JavaBeans developers has used a powerful framework found in the java.beans package to enforce data-validation rules.

The Managed Extensibility Framework (MEF) has been part of the .NET Framework since .NET 4.0. There are many tutorials across the Web on how to use MEF with Windows Forms, WPF and Windows Store. MEF ...