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.