public static bool isLatin(string text) { bool flag = text.All<char>((char c) => (char.IsLetterOrDigit(c) || c == '@' ? true : c == '.')); return flag; } Код public static bool isLatin(string text) { bool flag = text.All<char>((char c) => (char.IsLetterOrDigit(c) || c == '@' ? true : c == '.')); return flag; }