title: Use of unassigned local variable 'folderPath'
body: <p>I have error:</p>
  
  <blockquote>
    <p>Use of unassigned local variable 'folderPath'</p>
  </blockquote>
  
  <p>When I use this code:</p>
  
  <pre><code>string folderPath = folderPath.Substring(folderPath.IndexOf(@"\") + 1) + @"C:\test\" + "_converted";
  </code></pre>
  
  <p>How to resolve it?</p>