Implementing the inheritance

Explain how would you implement the inheritance by using VB.NET/C#?




Whenever we set out to implement a class by using inheritance, we should first begin with an existing class from which we will derive new subclass. This existing class or base class might be part of.NET system class library framework, it might be part of some other application or .NET assembly or we might create it as a part of our existing application. Once we encompass a base class, we can then implement one or more subclasses based on base class. Each of our subclasses will automatically encompass all the methods, properties and events of that base class comprising the implementation behind each method, property and event. Our subclass can add new methods, properties and events of its own; extending the original interface with latest functionality. As well, a subclass can replace the methods and properties of base class with its own new implementation-efficiently overriding the original behavior and replacing it by using new behaviors. Basically inheritance is a manner of merging functionality from existing class to our new subclass. Inheritance as well defines rules for how such methods, properties and events can be merged. In VB.NET we can employ implements keyword for inheritance, whereas in C# we can use the sign (::) among subclass and base class.

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