static bool NeedToEscapeDataChar (char b) { return !((b >= 'A' && b <= 'Z') || (b >= 'a' && b <= 'z') || (b >= '0' && b <= '9') || b == '_' || b == '~' || b == '!' || b == '\'' || b == '(' || b == ')' || b == '*' || b == '-' || b == '.'); }