主题：【求助】字符串处理相关的问题？

已知"a|b|c", "b|c|d", "d|e|f"，怎么通过代码将这三个合并得到"a|b|c|d|e|f"？

Dim a As String = "a|b|c"
Dim b As String = "b|c|d"
Dim c As String = "d|e|f"
Dim ls As new List(of String)
Dim arys() = {a, b, c}
For Each ary As object In arys
    For Each s As String In ary.split("|")
        If ls.Contains(s) = False Then
            ls.add(s)
        End If
    Next
Next
msgbox(String.join("|", ls.ToArray))

学习了