I have a user control that inherits from another user control. The base user
control works fine in the designer, I can see all of the controls, etc...

However when I open the derived control in the designer, all I see is a grey
square with no controls. I have tried attaching to the IDE with another
instance's debugger, but no exceptions are being thrown when the control is
open.

Here is how the constructors are setup:

Base Control:

public class MyBase : System.Windows.Forms.UserControl
{
   [Browsable(false)]
   protected AnotherObject _oObject;
       
   [Browsable(false)]
   public AnotherObject oObject
   {
       get{ return _oObject; }
       set{ _oObject= value; }
   }

   public MyBase()
   {
       _oObject= new AnotherObject ();
   }

   public MyBase (AnotherObject oObject)
   {
       InitializeComponent();
       _oObject= oObject;
   }
}

Derived Control:

public class MyDerived: MyBase
{

   public MyDerived(AnotherObject oObject) : base(oObject)
   {
       InitializeComponent();
   }

   public MyDerived() : base()
   {
   }

}

Please help!