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What is Dynamic Polymorphism in C#?
Polymorphism can be static or dynamic. In static polymorphism, the response to a function is determined at the compile time. In dynamic polymorphism, it is decided at run-time.
Dynamic polymorphism is implemented by abstract classes and virtual functions. The following is an example showing an example of dynamic polymorphism −
Example
using System; namespace PolymorphismApplication { class Shape { protected int width, height; public Shape( int a = 0, int b = 0) { width = a; height = b; } public virtual int area() { Console.WriteLine("Parent class area :"); return 0; } } class Rectangle: Shape { public Rectangle( int a = 0, int b = 0): base(a, b) {} public override int area () { Console.WriteLine("Rectangle class area :"); return (width * height); } } class Triangle: Shape { public Triangle(int a = 0, int b = 0): base(a, b) {} public override int area() { Console.WriteLine("Triangle class area :"); return (width * height / 2); } } class Caller { public void CallArea(Shape sh) { int a; a = sh.area(); Console.WriteLine("Area: {0}", a); } } class Tester { static void Main(string[] args) { Caller c = new Caller(); Rectangle r = new Rectangle(10, 7); Triangle t = new Triangle(10, 5); c.CallArea(r); c.CallArea(t); Console.ReadKey(); } } }
Output
Rectangle class area : Area: 70 Triangle class area : Area: 25
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