sealed types and methods. : sealed « Class « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Class
3. sealed

To prevent a class from being inherited, precede its declaration with sealed.

sealed class FooSealed {}

class BaseClass
{
    protected virtual void Bar() { /*...*/ }
}

class Derived : BaseClass
{
    protected override sealed void Bar() { /* ... */ }
}