[Solved] Why can't an abstract class in C# be sealed at the same time? - Ans: Because sealed classes cannot be inherited, but abstract classes require... | C Sharp (C#)

C Sharp (C#) - Polymorphism and Abstract Classes

Why can't an abstract class in C# be sealed at the same time?

ABecause abstract classes are always static, sealed classes cannot be static.

BBecause sealed classes cannot be inherited, but abstract classes require inheritance.

CBecause sealed classes must have all methods implemented, abstract classes do not.

DBecause sealed classes cannot contain abstract methods.

Step-by-Step Solution

Solution:

Step 1: Understand sealed and abstract class roles
Sealed classes prevent inheritance; abstract classes require inheritance to implement abstract members.
Step 2: Analyze incompatibility
Combining sealed and abstract is contradictory because abstract classes must be inherited.
Final Answer:
Because sealed classes cannot be inherited, but abstract classes require inheritance. -> Option B
Quick Check:
Sealed blocks inheritance; abstract needs inheritance [OK]

Quick Trick: Sealed blocks inheritance; abstract needs it [OK]

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