如何读取txt文本中url的内容

怎么读取txt文本中url的内容
txt文本中有几千条url地址

 int counter = 0;
  string line;

  // Read the file and display it line by line.
  System.IO.StreamReader file =
  new System.IO.StreamReader(@"C:\Users\test\Desktop\contenturllist.txt");
  while ((line = file.ReadLine()) != null)
  {
  System.Console.WriteLine(line);
  counter++;
   
  }

  file.Close();
  System.Console.WriteLine("There were {0} lines.", counter);
  // Suspend the screen.
  System.Console.ReadLine();
这个代码是读取文本所有的url地址

byte[] getdate = obj.getdate("http://build.0551fangchan.com/2011-12-19/71299-1.html");
  singlenewssave temp = new singlenewssave();
  temp.init(getdate);
  Console.WriteLine(temp.title);
  Console.Read();


这个是读取一条url的标题

现在的问题是怎么样读取所有url的标题，要怎么做。。。
byte[] getdate = obj.getdate("http://build.0551fangchan.com/2011-12-19/71299-1.html");
这个要怎么改

[解决办法]
正则通用的链接

HTML code

^((https?|ftp|news):\/\/)?([a-z]([a-z0-9\-]*[\.。])+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))(\/[a-z0-9_\-\.~]+)*(\/([a-z0-9_\-\.]*)(\?[a-z0-9+_\-\.%=&]*)?)?(#[a-z][a-z0-9_]*)?$