using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        var text = "some    " + ((char)0xA) + " text " + ((char)0xB6) + " 12345";

        Console.WriteLine("Original text: '" + text + "'");

        var newtext = Regex.Replace(text, "[\x0-\x1F]", "");

        Console.WriteLine("New text: '" + newtext + "'");

    }

}