XML : Read specific place from XML c#

So I have an XML file and it gets information from imdb which is like that,

  <?xml version="1.0" encoding="UTF-8"?><root response="True"><movie title="Game of Thrones" year="2011–" rated="TV-MA" released="17 Apr 2011" runtime="56 min" genre="Adventure, Drama, Fantasy" director="N/A" writer="David Benioff, D.B. Weiss" actors="Peter Dinklage, Lena Headey, Emilia Clarke, Kit Harington" plot="Several noble families fight for control of the mythical land of Westeros." language="English" country="USA" awards="Won 1 Golden Globe. Another 133 wins &amp; 248 nominations." poster="http://ia.media-imdb.com/images/M/MV5BNTgxOTI4NzY2M15BMl5BanBnXkFtZTgwMjY3MTM2NDE@._V1_SX300.jpg" metascore="N/A" imdbRating="9.5" imdbVotes="868,876" imdbID="tt0944947" type="series"/></root>    

I wanna get a specific attribute which is imdbRating I've looked so many parse questions from this site and I still couldn't figured it out best solution I come up with is,

  XDocument doc = XDocument.Parse("game of thrones.xml");  string var = doc.Descendants("movie title").Attributes("imdbRating").FirstOrDefault().Value;  labelImdb.Content = var;    

but it does give me an error in this line

  XDocument doc = XDocument.Parse("game of thrones.xml");    

I also tried that and didn't work either

  var xml = new XmlDocument();  xml.LoadXml("game of thrones.xml");  string dummy = xml.DocumentElement.SelectSingleNode("imdbRating").InnerText;  Console.WriteLine(dummy);  Console.ReadLine();    

second one gives an error in this line,

  xml.LoadXml("game of thrones.xml");