title: Add Values to a Row of TreeList of DevExpress
body: <p>I am creating an application and used a TreeList of DevExpress.
  Currently, I am the one who created the nodes of TreeList in the node editor and planned that all data will be read or transferred in my TreeList by adding it to the specified column.</p>
  
  <p>How could I achieve this?</p>
  
  <p>Here is my code</p>
  
  <pre><code>tbl.Rows.Add(4,  4, 10 );
  tbl.Rows.Add(5, 5, 30);
  </code></pre>
  
  <p>but it doesn't work at all. I'm just getting an exception.</p>