How can you establish relationship between tables in a Dataset?

Dateset ds=new Dataset(); Datatable dt1=new Datatable("Table1"); Datatable dt2=new Datatable("Table1"); ds.table.add(dt1); ds.table.add(dt2); DataRelation relation ; DataColumn table1Column ; DataColumn table2Column ; table1Column = ds.Tables["Table1"].Columns[0]; table2Column = ds.Tables["table2"].Columns[0]; relation = new DataRelation("relation", table1Column, table2Column); ds.Relations.Add(relation);