using System;
            using System.Text.RegularExpressions;
            namespace teste
            {
                class Program
                {
                    static void Main(string[] args)
                    {
 
                        string[] itens = { "exemplo1", "\r", "exemplo3", "exemplo4", "\r", "\r\r\r\r", "exemplo7", "exemplo8" };
                        Regex r = new Regex(@"\r",RegexOptions.IgnoreCase);
                        foreach (string e in itens)
                            if(!r.IsMatch(e))
                                Console.WriteLine(e);
                    }
                }
            }

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