' A reusable function that merges two ArrayList objects' Example:'     Dim al As New ArrayList()'     al.Add("Jack")'     al.Add("Mary")'     val.Add("Bob")'     al.Add("Tom")'     '     Dim al2 As New ArrayList()'     al2.Add("Frank")'     al2.Add("Lee")'     al2.Add("Nick")'     '     al = ArrayListJoin(al, al2)Function ArrayListJoin(ByVal al1 As ArrayList, ByVal al2 As ArrayList) As _    ArrayList    ' Note how we avoid time-consuming reallocations.    ArrayListJoin = New ArrayList(al1.Count + al2.Count)    ' Append the items in the two ArrayList arguments.    ArrayListJoin.AddRange(al1)    ArrayListJoin.AddRange(al2)End Function' Note: this code is taken from Francesco Balena's "Programming Microsoft ' Visual Basic .NET" book (MS Press 2002)