>com'è andata???
Mi da il seguente errore: This relation should connect two tables in this DataSet to be added to this DataSet
DataSet dsRel = new DataSet("scadenziario_newsletter");
DataColumn parentColumn = ds.Tables["scadenziario"].Columns["ev_item_id"];
DataColumn childColumn = ds.Tables["newsletter"].Columns["Items.id"];
DataRelation relAll;
relAll = new DataRelation("scadenziario_newsletter", parentColumn, childColumn, false);
dsRel.Relations.Add(relAll);