using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
 
public class Test
{
	public static void Main()
	{
    	var s = "\x08	\n\r";
    	var hasAsciiControlChr = Regex.IsMatch(s, @"[\u0000-\u001F\u007F]");
       	Console.WriteLine(hasAsciiControlChr);
       	var list1 = Regex.Matches(s, @"[\u0000-\u001F\u007F]")
       		.Cast<Match>()
       		.Select(m => m.Value)
       		.ToList();
       	Console.WriteLine("'{0}'", string.Join("';'", list1));
	}
}

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