Dim Str1() As String = {"123", "321", "231", "132"}Dim Str2() As String = {"qwe", "asd", "zxc", "sdf", "asdf"} Dim Str() As String = Str1ReDim Preserve Str(Str1.Length + Str2.Length - 1) Str2.CopyTo(Str, Str1.Length)