Is there a way to force all subclasses to be sealed?

Question

I have an project requirement, which an specific abstract class should force all subclasses to be sealed C#, for instance:

public abstract class BaseProcess {
}

public sealed class HealthCheck : BaseProcess {
//Valid class
}

public class EtlSales : BaseProcess {
//Invalid, should emit a warning or a error when i compile
}

There's a data annotation or keyword, that force this configuration?

Answer 1

No. Unfortunately, C# does not have such an option.