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

        public static CharGrouping Parenthesis() => LeftParenthesis().RightParenthesis();

 /// <summary>
 /// Appends a pattern that matches left or right parenthesis.
 /// </summary>
 /// <returns></returns>
 public CharGrouping Parenthesis() => Append(Chars.Parenthesis());