How can I scan a string to determine if it contains DBCS chars?

VB.NET Public Shared Function IsAsciiString(s As [String]) As Boolean Dim i As Integer For i = 0 To s.Length – 1 Dim ch As Char = s(i) If ch < 0 Or ch > 127 Then Return False End If Next Return True End Function ’IsAsciiString ’In Page_Load dim originalString as string = ‘a±’ Response.Write (IsAsciiString(originalString)) C# public static bool IsAsciiString(String s) { for (int i = 0; i < s.Length; i++) { char ch = s[i]; if (ch < 0 || ch > 127) return false; } return true; } //In Page_Load String originalString = ‘a±’ ; Response.Write (IsAsciiString(originalString));