Answer
A sealed class cannot be inherited.
It is used to prevent further extension of a class.
Quick Answer
A sealed class cannot be inherited — no subclasses allowed. Use it to lock down your design and prevent misuse. The string class in .NET is sealed. It also lets the compiler optimize virtual method calls since no overrides are possible.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ