Question:

Give an example of using sealed class in C#?

Answer:

Below is the sample code of sealed class in C# -

class X {} 
sealed class Y : X {}

Sealed methods –

class A
{
 protected virtual void First() { }
 protected virtual void Second() { }
}
class B : A
{
 sealed protected override void First() {}
 protected override void Second() { }
}

If any class inherits from class “B” then method – “First” will not be overridable as this method is sealed in class B.


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