vb.net – 在逗号上拆分字符串并打印结果

Private Sub Button1_Click(sender As Object, e As EventArgs) 
      Handles Button1.Click
    Dim s As String = "a,bc,def,ghij,klmno"
    Dim parts As String() = s.Split(New Char() {","c})
    Dim part As String

    For Each part In parts
        MsgBox(part(0))
    Next

End Sub

但是消息框仅显示每个分割字符串中的第一个字符(a,b,d,g,k).

我想只显示第一个字,我做错了什么？

Dim firstWord = parts(0)
 Console.WriteLine(firstWord) ' Should print `a` from your text sample

 ' or simply
 Console.WriteLine(parts(0)) 

 ' and the second word is     
 Console.WriteLine(parts(1))  ' prints `bc`