ASP.NET 3.5: A Beginner's Guide - www.mustafaof.com

102ASP.NET 3.5: A Beginner’s GuideAsk the ExpertQ: What exactly is meant by inheritance?A: When one class or partial class inherits another class, the inheriting class gets all of thecharacteristics of the class it inherits. That means that the inheriting class, called the child orsubclass of the inherited class, can use all of the methods and properties of the parent class./// Summary description for UseIfaceB/// public class UseIfaceB : IfaceIt{public String Show(){return "Second Implementation";}}You might want to make sure that the files for the interface and the two classes thatimplement the interface are in the App_Code folder before you test your application.When everything is ready, go ahead and test it by selecting the Iface.aspx file in theSolution Explorer and pressing CTRL-F5.Figure 4-9 shows the different results generated by the same interface implemented intwo different classes. The partial class that you’re accustomed to using with ASP.NET codeis able to instantiate objects based on the interface with no problems. The same is true withlarger structures in C# that use interface.Figure 4-9 ASP.NET Label displays strings from two different classes implementing a singleinterface.