问一linq to xml问题

Question

我的xml如下：<feed gd:kind="buzz#activityFeed" xmlns="http://www.w3.org/2005/Atom" xmlns:activity="http://activitystrea.ms/spec/1.0/" xmlns:buzz="http://schemas.google.com/buzz/2010" xmlns:crosspost="http://purl.org/syndication/cross-posting" xmlns:gd="http://schemas.google.com/g/2005" xmlns:georss="http://www.georss.org/georss" xmlns:media="http://search.yahoo.com/mrss/" xmlns:poco="http://portablecontacts.net/ns/1.0" xmlns:thr="http://purl.org/syndication/thread/1.0">
  <link rel="self" type="application/atom+xml" href="https://www.googleapis.com/buzz/v1/activities/103854838474576564357/@public?alt=atom" />
  <link rel="hub" href="http://pubsubhubbub.appspot.com/" />
  <title>Google Buzz Public Feed for ddddddd</title>
  <updated>2010-12-21T13:44:03.083Z</updated>
  <id>tag:google.com,2010:buzz-feed:public:posted:103854838474576564357</id>
  <generator uri="http://www.google.com/buzz">Google Buzz</generator>
  <entry gd:kind="buzz#activity">
    <title>asdfasdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdf。</title>
    <published>2010-12-21T13:44:02.000Z</published>
    <updated>2010-12-21T13:44:03.083Z</updated>
    <id>tag:google.com,2010:buzz:z125iffjxznzj5pkk23dzhupbwvhzxdep</id>
    <link rel="alternate" type="text/html" href="http://www.google.com/buzz/103854838474576564357/3nokvYxiAdf" />
    <link rel="self" type="application/atom+xml" href="https://www.googleapis.com/buzz/v1/activities/103854838474576564357/@self/B:z125iffjxznzj5pkk23dzhupbwvhzxdep?alt=atom" />
    <link rel="replies" type="application/atom+xml" href="https://www.googleapis.com/buzz/v1/activities/103854838474576564357/@self/B:z125iffjxznzj5pkk23dzhupbwvhzxdep/@comments?alt=atom" thr:count="0" thr:updated="2010-12-21T13:44:03.083Z" />
    <author>
      <poco:id>103854838474576564357</poco:id>
      <poco:photoUrl />
      <name>ddddddd</name>
      <uri>http://www.google.com/profiles/103854838474576564357</uri>
      <link rel="photo" type="image/jpeg" href="" />
      <activity:object-type>http://activitystrea.ms/schema/1.0/person</activity:object-type>
    </author>
    <content type="html">asdfasdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdf。</content>
    <activity:verb>http://activitystrea.ms/schema/1.0/post</activity:verb>
    <activity:object>
      <activity:object-type>http://activitystrea.ms/schema/1.0/note</activity:object-type>
      <content type="html">asdfasdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdf。</content>
      <buzz:original-content type="text" />
      <link rel="alternate" type="text/html" href="http://www.google.com/buzz/103854838474576564357/3nokvYxiAdf" />
    </activity:object>
    <source>
      <activity:service>
        <title>www.asdd.com</title>
      </activity:service>
    </source>
    <buzz:visibility>
      <buzz:aclentry type="group">
        <poco:id>G:@me:@public</poco:id>
        <uri>https://www.googleapis.com/buzz/v1/people/@me/@groups/G:@me:@public?alt=atom</uri>
        <poco:name>Public</poco:name>
      </buzz:aclentry>
    </buzz:visibility>
    <link rel="http://schemas.google.com/buzz/2010#liked" type="application/poco+xml" href="https://www.googleapis.com/buzz/v1/activities/103854838474576564357/@self/B:z125iffjxznzj5pkk23dzhupbwvhzxdep/@liked?alt=atom" buzz:count="0" />
  </entry>  
</feed>var queryda = from entry in xelement.Elements(XName.Get("entry", "http://www.w3.org/2005/Atom"))
                      select new
                      {                          
                          stsource = entry.Element(XName.Get("source", "http://www.w3.org/2005/Atom")).Element(XName.Get("service", "http://activitystrea.ms/spec/1.0/")).Element(XName.Get("title", "http://www.w3.org/2005/Atom")).Value，
　　　　　　　　　　　　　linkcount = entry.Element(XName.Get("link", "http://www.w3.org/2005/Atom")).Attribute("http://schemas.google.com/buzz/2010" + "count").Value,//这里出错
};问题１我想取得
<link rel="http://schemas.google.com/buzz/2010#liked" type="application/poco+xml" href="https://www.googleapis.com/buzz/v1/activities/103854838474576564357/@self/B:z125iffjxznzj5pkk23dzhupbwvhzxdep/@liked?alt=atom" buzz:count="0" />中的count值。还有一个问题就是，entry.Element(XName.Get("link"　得到几个link，我以上语句如何区分想要的link?是通过rel条件吗？如果是，这个条件怎么判断？