Admin: Created page with "The '''Liskov substitution principle''' states that if S is a subtype of T, then objects of type T may be replaced (or substituted) with objects of type S. In other words a s..."

2019-08-15T14:58:21Z

Created page with "The '''Liskov substitution principle''' states that if S is a subtype of T, then objects of type T may be replaced (or substituted) with objects of type S. In other words a s..."

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The '''Liskov substitution principle''' states that if S is a subtype of T, then objects of type T may be replaced (or substituted) with objects of type S.

In other words a subclass should override the parent class methods in a way that does not break functionality.
== Liskov Substitution Principle Example ==

In the below code we can notice that reference of '''Shapes''' can hold object of '''Square''' and '''Circle''' because it is inherited from Shapes.

class Program
{
static void Main(string[] args)
{
Shapes _Shapes = new Square() { length=4, width=5};
_Shapes.calculateArea();
_Shapes = new Circle() { radius = 4 };
_Shapes.calculateArea();
Console.ReadLine();
}
}
abstract class Shapes
{
public Shapes()
{
Console.WriteLine("Class : Shapes");
}
public abstract double calculateArea();
}
class Square : Shapes
{
public double length { get; set; }
public double width { get; set; }
public override double calculateArea()
{
return (length * width);
}
}
class Circle : Shapes
{
public double radius { get; set; }
public override double calculateArea()
{
return ((3.14) * radius * radius);
}
}

Liskov Substitution Principle - Revision history

Admin: Created page with "The '''Liskov substitution principle''' states that if S is a subtype of T, then objects of type T may be replaced (or substituted) with objects of type S. In other words a s..."