using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string replaceNewLineRegexLiteral = @"\r\n?|\n";

        string replaceNonAlphaRegexLiteral = @"[^\w]";

        string _wordBoundaryRegEx = @"\b[a-zA-Z0-9 ]*\S";

        string exampleNewlineAndReturnTxt = @".

                            line of text 1

                              line of text 2

                            ..";

        string exampleNonAlphanumericTxt = ")($$+$S!-%e%)c£%£r%£-e%t£1)%2£3";

        Console.WriteLine(exampleNewlineAndReturnTxt);

        var transformed = Regex.Replace(exampleNewlineAndReturnTxt, replaceNewLineRegexLiteral, String.Empty);

        Console.WriteLine($"\r\n\r\n{transformed}\r\n\r\n");

        Regex rgx = new Regex(_wordBoundaryRegEx);

        MatchCollection matches = rgx.Matches(exampleNewlineAndReturnTxt);

        foreach (Match match in matches)

        {

            Console.WriteLine(match.Value);

        }

        Console.WriteLine($"\r\n\r\n{exampleNonAlphanumericTxt}");

        transformed = Regex.Replace(exampleNonAlphanumericTxt, replaceNonAlphaRegexLiteral, String.Empty);

        Console.WriteLine($"\r\n\r\n{transformed}");

    }

}