>>I think oDataTable is null. If it is, you cannot copy it. Only copy if oDataTable is not null
>
>Ok, so far so good, I now have this:
>
>

>    ' Clone this object
>    Public Function Clone() As Object Implements System.ICloneable.Clone
>        Dim loData As Data = DirectCast(MemberwiseClone(), Data)
>
>        ' Add to the cloning object the dataset as well
>        ' MemberwiseClone only copies value types
>        ' So just returning Return MyBase.MemberwiseClone() would not do if after the cloning the access to the original dataset is needed
>        loData.oDataSet = loData.oDataSet.Copy()
>
>        ' If we have oDataTable
>        If Not loData.oDataTable Is Nothing Then
>            loData.oDataTable = loData.oDataTable.Copy()
>        End If
>
>        Return loData
>    End Function
>

>
>But, I assume I have to handle those ones:
>
>

>    Public oDataView As DataView = Nothing
>    Public oRow As DataRow = Nothing
>    Public oRowInitial As DataRow = Nothing
>    Public oRows As DataRowCollection = Nothing
>

>
>And, oDataView does not offer a copy. It starts to get complicated.

Do you really need a copy. Can't you just create a new one with the copied DataTable ?

>I really do not understand why a full cloning is not supported.

Because they found it started to get (too) complicated.