title: How to check if ALL items in list are empty string or null, if true do something asp.net
body: <p>I have list of items, like this:</p>
  <pre><code>   user = &quot;&quot;,
     name = null,
     surname = &quot;&quot;,
     age = null,
     nickname = &quot;&quot;    
  </code></pre>
  <p>How to check if <strong>ALL</strong> items in the list are empty strings or null do something...</p>