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

        public static CharGrouping LatinLetter() => Range('a', 'z').Range('A', 'Z');

 /// <summary>
 /// Appends a pattern that matches a latin alphabet letter.
 /// </summary>
 /// <returns></returns>
 public CharGrouping LatinLetter() => Append(Chars.LatinLetter());