Cannot parse xml from Yahoo! Fantasy Sports with c#

I did some searching around the web and could not find the cause of my problem so I apologize if that has already been asked in another form I just did not understand.

My problem is that I am trying to parse the XML retrieved from Yahoo! Fantasy Sports but nothing seems to be working.

I have converted the XML I received (using a GET request with my credentials) into a string. Here it is for evaluation.

<?xml version="1.0" encoding="UTF-8" ?> 
- <fantasy_content xml:lang="en-US" yahoo:uri="http://fantasysports.yahooapis.com/fantasy/v2/game/223/players"     xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" time="5489.1560077667ms" copyright="Data provided by Yahoo! and STATS, LLC" refresh_rate="60"     xmlns="http://fantasysports.yahooapis.com/fantasy/v2/base.rng">
- <game>
  <game_key>223</game_key> 
  <game_id>223</game_id> 
  <name>Football PLUS</name> 
  <code>pnfl</code> 
  <type>full</type> 
  <url>http://football.fantasysports.yahoo.com/f2</url> 
  <season>2009</season> 
- <players count="25">
- <player>
  <player_key>223.p.8261</player_key> 
  <player_id>8261</player_id> 
- <name>
  <full>Adrian Peterson</full> 
  <first>Adrian</first> 
  <last>Peterson</last> 
  <ascii_first>Adrian</ascii_first> 
  <ascii_last>Peterson</ascii_last> 
  </name>
  <editorial_player_key>nfl.p.8261</editorial_player_key> 
  <editorial_team_key>nfl.t.16</editorial_team_key> 
  <editorial_team_full_name>Minnesota Vikings</editorial_team_full_name> 
  <editorial_team_abbr>Min</editorial_team_abbr> 
- <bye_weeks>
  <week>9</week> 
  </bye_weeks>
  <uniform_number>28</uniform_number> 
  <display_position>RB</display_position> 
- <headshot>
<url>http://l.yimg.com/iu/api/res/1.2/7gLeB7TR77HalMeJv.iDVA--/YXBwaWQ9eXZpZGVvO2NoPTg2MDtjcj0xO2N3PTY1OTtkeD0xO2R5PTE7Zmk9dWxjcm9wO2g9NjA7cT0xMDA7dz00Ng--/http://l.yimg.com/j/assets/i/us/sp/v/nfl/players_l/20120913/8261.jpg</url> 
  <size>small</size> 
  </headshot>
  <image_url>http://l.yimg.com/iu/api/res/1.2/7gLeB7TR77HalMeJv.iDVA--/YXBwaWQ9eXZpZGVvO2NoPTg2MDtjcj0xO2N3PTY1OTtkeD0xO2R5PTE7Zmk9dWxjcm9wO2g9NjA7cT0xMDA7dz00Ng--/http://l.yimg.com/j/assets/i/us/sp/v/nfl/players_l/20120913/8261.jpg</image_url> 
  <is_undroppable>1</is_undroppable> 
  <position_type>O</position_type> 
- <eligible_positions>
  <position>RB</position> 
  </eligible_positions>
  <has_player_notes>1</has_player_notes> 
  </player>
- <player>
  </players>
  </game>
  </fantasy_content>

The two methods I have tried are these (PLEASE NOTE: "xmlContent" is the string that contains the XML listed above):

1.)
XDocument chicken = XDocument.Parse(xmlContent);
var menus = from menu in chicken.Descendants("name")
select new
{
ID = menu.Element("name").Value,
};

and

2.)
byte[] encodedString = Encoding.UTF8.GetBytes(xmlContent);
MemoryStream ms = new MemoryStream(encodedString);

XmlDocument doc = new XmlDocument();
doc.Load(ms);

foreach (XmlNode row in doc).SelectNodes("//fantasy_content"))
{}

Basically, I get no results enumerated. I have a feeling I am missing some key steps here though. Any help is greatly appreciated. Thank you all.

UPDATE:

As per the awesome suggestions I received, I tried three more things. Since it is not working still, I did not listen very well. :) Actually, that is semi-accurate, please bear with my newbie attempt at working with XML here as I really am thankful for the responses. Here is how I am screwing up the great suggestions, can you offer another tip on what I missed? Thank you all again.

As per Jon Skeet's suggestion (this yields no results for me):

1.) XNamespace ns = "http://fantasysports.yahooapis.com/fantasy/v2/base.rng";
XDocument chicken = XDocument.Parse(xmlContent);
var menus = from menu in chicken.Descendants(ns + "fantasy_content")
select new
{
ID = menu.Element("name").Value,
};

As per the second suggestion (this throws me an error):

2.) var result = XElement.Load(xmlContent).Descendants().Where(x => x.Name.LocalName == "name");

As per the combinations of suggesting I need to identify the namespace and Yahoo! guide at: http://developer.yahoo.com/dotnet/howto-xml_cs.html

3.)     xmlContent = oauth.AcquirePublicData(rtUrl, "GET");

byte[] encodedString = Encoding.UTF8.GetBytes(xmlContent);

MemoryStream ms = new MemoryStream(encodedString);

XmlDocument doc = new XmlDocument();
doc.Load(ms);

XmlNamespaceManager ns = new XmlNamespaceManager(doc.NameTable);
ns.AddNamespace("fantasy_content", "http://fantasysports.yahooapis.com/fantasy/v2/base.rng");
XmlNodeList nodes = doc.SelectNodes("/name", ns);

foreach (XmlNode node in nodes)
{
}