>In my Data class, I have this also as definitions:
>
>

>    Public oDataSet As DataSet = Nothing
>    Public oDataTable As DataTable = Nothing
>    Public oDataView As DataView = Nothing
>    Public oParameters As ArrayList = New ArrayList
>    Public oRow As DataRow = Nothing
>    Public oRowInitial As DataRow = Nothing
>    Public oRows As DataRowCollection = Nothing
>

>
>The cloning, as it was before, worked for the parameters. So, I assume oParameters is a value type.
>
>I would then assume for the cloning to work, I would need to copy as well the other ones in here as they are not value types.

An ArrayList( oParameters ) is a reference type

If the ArrayList is not going to be changed - you can use the reference