Pihrtsoft.Text.RegularExpressions.Linq.Chars.NotDigit C# (CSharp) Method

        public static CharGrouping NotDigit() => Character(CharClass.NotDigit);

 /// <summary>
 /// Appends a pattern that matches a character that is not from the digit character class.
 /// </summary>
 /// <returns></returns>
 public CharGrouping NotDigit() => Append(Chars.NotDigit());