[Solved] Identify the error in this code snippet:abstract class Shape { public abstract double Area(); } class Circle : Shape { public double Area() { return 3.14 * 5 * 5; } } | C Sharp (C#)

C Sharp (C#) - Polymorphism and Abstract Classes

Identify the error in this code snippet:

abstract class Shape {
    public abstract double Area();
}

class Circle : Shape {
    public double Area() {
        return 3.14 * 5 * 5;
    }
}

ACircle class cannot inherit from Shape.

BArea() method cannot return double.

CShape class cannot have abstract methods.

DCircle must declare Area() as override.

Step-by-Step Solution

Solution:

Step 1: Check method overriding rules
When a subclass implements an abstract method, it must use the 'override' keyword.
Step 2: Identify missing override keyword
Circle's Area() method lacks 'override', causing a compile error.
Final Answer:
Circle must declare Area() as override. -> Option D
Quick Check:
Override abstract method = must use 'override' keyword [OK]

Quick Trick: Override abstract methods with 'override' keyword. [OK]

Common Mistakes:

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