用数组实现:
Dim parentcol() As DataColumn = {myDateSet.Table(0).Columns("f1"), myDateSet.Table(0).Columns("f2")}
Dim childcol() As DataColumn = {myDateSet.Table(1).Columns("f1"), myDateSet.Table(1).Columns("f2")}
myRelation = New DataRelation("every one", parentcol, childcol)
myDateSet.Relations.Add(myRelation)