Cannot assign script to objects when class is within a Namespace

I have a namespace that is a collection of classes that all need to know about each other. I want to be able to assign these different classes to objects. However, when I go to Add Component the Foo script file does not show up as a choice.

I have read some other issues related to this and they all seem to be based on default parameters. But as you can see I am not using any default params. Is there some other reason that my classes are not showing up as available scripts to assign to objects?

 namespace Foo
 {

     public enum mytype { Basic, Standard, Deluxe, Premium };

     public class Owner : MonoBehaviour
     {
         private string _name;
         private double _cash;
         private double _networth;
 
         public Owner()
         {
             _cash = 100000.00;
             _networth = _cash;
         }
 
         public string name
         {
             get { return _name; }
             set { _name = name; }
         }
         public double cash
         {
             get { return _cash; }
             set { _cash = cash; }
         }
         public double networth
         {
             get { return _networth; }
             set { _networth = networth; }
         }
     }
 }