protected static string NormalizeEncoding(string enc)
{
if (enc.Equals("winansi") || enc.Equals(""))
return CP1252;
else if (enc.Equals("macroman"))
return MACROMAN;
int n = IanaEncodings.GetEncodingNumber(enc);
if (n == 1252)
return CP1252;
if (n == 10000)
return MACROMAN;
return enc;
}