Please discuss the proper way to add an “index” (i.e. an Item method) to a collection class that is derived from CollectionBase.  That part of the below code doesn’t work; even though it is nearly copied from VS.Net Help.

Also, is List a property of CollectionBase, where List is an object type?
 
Thanks,
John Maggiore
 
Public Class Fluid
 
    Dim sName As String
 
    Property Name() As String
        Get
            Name = sName
        End Get
        Set(ByVal str As String)
            sName = str
        End Set
    End Property
 
      ‘Other stuff here.
 
End Class
 
 
Public Class FluidsCollection
    Inherits System.Collections.CollectionBase
 
    Sub Add(ByVal f As Fluid)
        list.Add(f)
    End Sub
 
    Sub Remove(ByVal f As Fluid)
        Dim idx As Long
        idx = list.IndexOf(f)
        list.RemoveAt(idx)
    End Sub
 
    Overrides Sub Clear()
        list.Clear()
    End Sub
 
    ReadOnly Property Item(ByVal idx As Integer) As Fluid
        Get
            Return CType(list.Item(idx), Fluid)  ‘ Not allowed???
        End Get
    End Property
 
End Class