Does exist any way to force child class to have at least one field with a specified attribute?

Question

Suppose we have created an attribute named [Mandatory]. Those exist any way to force a child class to have at least on field with this attribute while the parent class does not have any field?? For example suppose this:

class parent{
    public abstract void doSomething(){};
}

What should I add to the parent class so child class had to be something like this:

class parent{
    [Mandatory] public field1;
    public override void doSomething(){ // do something ...};
}

And if it did not contain field1 it could not be compiled. Does exist something like this in c#?

Update

The parent class is only to apply a rule that Already staff respect but I wanted to guarantee that everybody have to declare at least on field. I think this is not a case of object oriented application. But I'm trying to force them obey this convention using oop! If it is not the correct way please inform me.

Thanks for any help.

Answer 1

Did you specifically want an abstract field or is a property sufficient?

How about the following?

abstract class Base
{
    public abstract int Field { get; set; }
}

class Derived : Base
{
    public override int Field { get; set; }
}