Public Class Tester
Public Shared Sub Main
Dim source As String = _
Space(17) & "This string had " & Chr(12) & _
StrDup(5, Chr(9)) & "extra whitespace. " & Space(27)
Dim thisIsWhiteSpace As Boolean
Dim prevIsWhiteSpace As Boolean
Dim result As New System.Text.StringBuilder(source.Length)
Dim counter As Integer
For counter = 0 To source.Length - 1
prevIsWhiteSpace = thisIsWhiteSpace
thisIsWhiteSpace = Char.IsWhiteSpace(source.Chars(counter))
If (thisIsWhiteSpace = False) Then
If (prevIsWhiteSpace = True) AndAlso _
(result.Length > 0) Then result.Append(Space(1))
result.Append(source.Chars(counter))
End If
Next counter
Console.WriteLine(result.ToString())
End Sub
End Class
This string had extra whitespace.