parse text file in c#

List output=new List();
using (StreamReader sr = new StreamReader("E:\\op.html"))         {             string line;             while ((line = sr.ReadLine()) != null)             {
                 if(line.Contains("youtube-ui.l.google.com. 118 IN A "))

                                {
                                        output.Add(line.Replace("youtube-ui.l.google.com. 118 IN A ","");
                                }

             }
        }
//Now you'll get result in variable output




Please accept answer if this works for you. Thanks