文字列中の異文字を16進表示する関数(VB.NET)

VB.NETに焼き直して、

Public Class Class1
Public Shared Sub Main()
Dim s = "あｱabc" & Chr(10) & ChrW(128)
MsgBox(xString(s))
End Sub

Private Shared Function xString(ByVal s As String) As String
Dim x As String = ""
For k As Integer = 1 To Len(s)
  Dim c = Mid(s, k, 1)
  If 31 < AscW(c) AndAlso AscW(c) < 128 Then
  ElseIf &Hff60 < AscW(c) And AscW(c) < &Hffa0 Then
  ElseIf Chr(Asc(c)) = c And Asc(c) < 0 Then
  Else
    c = Hex(AscW(c))
    c = "{" & New String("0"c, Len(c) Mod 2) & c & "}"
  End If
  x = x & c
Next
Return x
End Function
End Class