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Implementation inheritance in C#

Def: In object - oriented programming, there are two distinct types of inheritance — implementation inheritance and interface inheritance:

- Implementation inheritance means that a type derives from a base type, taking all the base type ’ s member fields and functions.

Des r: With implementation inheritance, a derived type adopts the base type ’ s implementation of each function, unless it is indicated in the definition of the derived type that a function implementation is to be overridden. This type of inheritance is most useful when you need to add functionality to an existing type, or when a number of related types share a significant amount of common functionality.

Ex:If you want to declare that a class derives from another class, use the following syntax:

class MyDerivedClass: MyBaseClass

{ // functions and data members here}

If a class (or a struct) also derives from interfaces, the list of base class and interfaces is separated by commas:

public class MyDerivedClass: MyBaseClass, IInterface1, IInterface2

{ // etc. }

For a struct, the syntax is as follows:

public struct MyDerivedStruct: IInterface1, IInterface2

{ // etc. }

If you do not specify a base class in a class definition, the C# compiler will assume that System.Object is the base class. Hence, the following two pieces of code yield the same result:

class MyClass // derives from System.Object

{ // etc.}

Because C# supports the object keyword, which serves as a pseudonym for the System.Object class, you can also write:

class MyClass: object // derives from System.Object

{ // etc.}

EX: public class Shape;

{ int x,y;

Public virtual string Draw(string Figure)

{Cons.wr.(Figure);}

}

Class Rectangle: Shape

{ public override string Draw(string Name)

{Cons.Wr(“Rectangle”);}

}

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