UserControls and Collections Property

[CMM]

With a Web *UserControl* (not webcontrol) how do you make a collection--
either custom col derived from CollectionBase or a .NET 2.0 generic List(Of
MyClass)--- accessible as a property? MyClass is a simple class with just a
couple of String properties.

I've tried decorating the property with
<DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
_
PersistenceMode(PersistenceMode.InnerProperty), _
NotifyParentProperty(True)> _
Public ReadOnly Property MyItems() As MyClassCollection
...

But it won't work (the first attribute is enough to make any custom
collection editable via the PropertyEditor in WinForms.... why not
ASP.NET?).