internal static string EscapeFormatString(string message, char[] permitted)
{
if (message == null)
{
return(string.Empty);
}
StringBuilder stringBuilder = new StringBuilder(message.Length);
for (int i = 0; i < message.Length; i++)
{
char chr = message[i];
stringBuilder.Append(chr);
if (chr == '%' && i + 1 < message.Length)
{
char chr1 = message[i + 1];
if (chr1 == '%' || UnixMarshal.IsCharPresent(permitted, chr1))
{
stringBuilder.Append(chr1);
}
else
{
stringBuilder.Append('%').Append(chr1);
}
i++;
}
else if (chr == '%')
{
stringBuilder.Append('%');
}
}
return(stringBuilder.ToString());
}