How to prevent hide or override on a public property

Question

I have an abstract base class that has a Property on it that I would like to prevent both hiding, aka new, and override on.

public abstract class DomainObject
{
    public bool IsDeleted { get; set; }
}

public class BankAccount : DomainObject
{
    public bool IsDeleted { get; set; }
}

The issue is: I need BankAccount to inherit from the base DomainObject class, so I can't mark it as sealed, but I want to prevent the situation, an override or new, of IsDeleted at compile time.

Answer 1

In this case IsDeleted is not virtual so an override is not possible. In general though you can prevent the override case by not making a property virtual in the first place or preventing further overrides by specifying the sealed modifier on the property

public sealed override IsDeleted { get; set; }

However you can't prevent the hidding via new. There is no way to prevent a sub-type from using new on an existing property other than preventing sub-types altogether

Answer 2

Why do you need such feature? It is not possible to prevent neither properties not methods from hiding in subclasses.