You could create the collections dynamically in a code stage. Granted that solution will put multiple nested collections in one main collection and the collections will only be populated at run time.
Hi Ed,
Here is some example code that you can use to add a nested datatable column
'Declare a new Datatable
Dim dt As DataTable = New DataTable
'Add your Columns
dt.Columns.Add(""ID"", GetType(Integer))
dt.Columns.Add(""Value"", GetType(DataTable))
'...
