Serialization of Collections

[sunburnt]

Back to this :P

I've noticed that when I try to serialize a Private Collection, I recieve no error -- it just doesn't save correctly. Now, I tried this:

<Serializable()> Public Class Test
    Public R As New Collection()
    Public M As String
End Class
 
   Private Sub SaveSettings(ByRef mypath As String, ByRef myObject As Object)
        Dim XmlS As XmlSerializer
        Dim fStream As IO.FileStream
        'Try
 
        XmlS = New XmlSerializer(myObject.GetType)
        fStream = New IO.FileStream(mypath, IO.FileMode.Create)
        XmlS.Serialize(fStream, myObject)
        fStream.Close()
    End Sub
 
        'CODE
        Dim f As New Test()
        f.R.Add("hi")
        f.m = ":-)"
        SaveSettings("C:\f.xml", f)

Which finally throws an error.
System.InvalidOperationException: There was an error reflecting 'MoW.Test'. ---> System.InvalidOperationException: You must implement the Add(System.Object) method on Microsoft.VisualBasic.Collection because it inherits from ICollection.

What does this mean?