title: DevExpress gridView Columns Add
body: <p>I'm using DevExpress library.</p>
  
  <p>I have problem with GridControl the following property is not appear :</p>
  
  <pre><code>gridView1.Columns.Add(); // not appear why ? 
  </code></pre>
  
  <p>My references are:</p>
  
  <pre><code>using DevExpress.XtraGrid.Views.Base;
  using DevExpress.XtraGrid.Views.Grid;
  using DevExpress.XtraGrid.Columns;
  </code></pre>