Collection type to a column

[eurob]

I try to assign the collection type to a column in a dataset, but when I run it I get the errmsg 'Requires valid data type".
Any idea ?

dim d as new datatable
Dim col As DataColumn = New DataColumn("mycollection")
col.DataType = System.Type.GetType("Collection")
d.Columns.Add(col)

 

[JohnH]

documentation: DataColumn.DataType Property it lists valid data types.