.net – 选择案例问题

For each c as char in "Hello World"
 Select Case c
  Case "h"
   DoSomething()
  Case "e"
   DoSomething()
  End Select
Next

为什么我不能这样写：

Case "h" Or "e"
 DoSomething()

它说’Long’值无法转换为’Char’

如何完成这项任务？

Select Case c
  Case "h"
  Case "e"
    DoSomething()
End Select

要么：

Select Case c
  Case "h","e"
    DoSomething()
End Select