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

        public static CharGrouping Plus() => Character(AsciiChar.Plus);

 /// <summary>
 /// Appends a pattern that matches a plus sign.
 /// </summary>
 /// <returns></returns>
 public CharGrouping Plus() => Append(Chars.Plus());