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Q:
Give an example of using sealed class in C#?

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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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