title: Parse XML with XDocument using C#
body: <p>I have the following XML file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;html&gt;
      &lt;body&gt;
          &lt;p&gt;&lt;p&gt;
             &lt;span class="screenitems"&gt;
                 Close 
                 &lt;MCap:variable name="1052.zartzut"&gt;&lt;/MCap:variable&gt; 
                 without prompting if you launch a non-
                 &lt;MCap:variable name="zirtZat"&gt;&lt;/MCap:variable&gt;
                 measurement module. (You will be prompted to save any unsaved data.)
                 &lt;span lol="scs"&gt;dsfsfs&lt;/span&gt;
              &lt;/span&gt;
          &lt;/p&gt;&lt;/p&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>I want to only delete <code>&lt;span class="screenitems"&gt;</code> and the corresponding end tag <code>&lt;/span&gt;</code>, so it should after parsing look as follows:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;html&gt;
      &lt;body&gt;
          &lt;p&gt;&lt;p&gt;
  
                 Close 
                 &lt;MCap:variable name="1052.zartzut"&gt;&lt;/MCap:variable&gt; 
                 without prompting if you launch a non-
                 &lt;MCap:variable name="zirtZat"&gt;&lt;/MCap:variable&gt;
                 measurement module. (You will be prompted to save any unsaved data.)
                 &lt;span lol="scs"&gt;dsfsfs&lt;/span&gt;
  
          &lt;/p&gt;&lt;/p&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p><code>&lt;span class="screenitems"&gt;</code>  is the only unique tag so in between this and <code>&lt;html&gt;</code>, you can have everything. Can you help me with this issue using <code>XDocument</code> methods in <code>C#</code> ?</p>