I used this code:
Public Function RemoveDiacritics(ByVal s As String) As String
Dim normalizedString As String
Dim stringBuilder As New StringBuilder
There's a couple resources that might be useful to you. You can find them here, and here. The first is a possible duplicate question with a few more functions that might help you figure out your problem. The second is an article that I stumbled upon while Googling your question. It turned out to be an excellent read.
Something more practical was this:
Public Function RemoveAccentMarks(ByVal s As String) As String
Dim stringBuilder As New StringBuilder
Dim c As Char
For Each c In s
Dim v As Char = Chr(Asc(c) And &H7F)
stringBuilder.Append(v)
Next
Return stringBuilder.ToString
End Function
(Source - you'll need to scroll to the bottom, it was Bob Strunz who claimed that it worked for him!)
Hope that helps, I rather enjoyed this question (upvote). It was fun, informative, and interesting!
-sf