title: read an xslx file and convert to List
body: <p>I have a xslx file with following data</p>
  
  <pre><code>    www.url.com
      www.url.com
      www.url.com
      www.url.com
      www.url.com
      www.url.com
      www.url.com
      www.url.com
      ...
  </code></pre>
  
  <p>Like you can see I have only 1 column used and a lot of rows.
  I need to read that column from the xslx file somehow and convert it to <code>List&lt;string&gt;</code>.</p>
  
  <p>Any help?</p>
  
  <p>Thanks!</p>