title: Add button column to datatable
body: <p>I am trying to insert a button column into a datatable but it says that its an error. Any help pleasE?</p>
  
  <pre><code>        ButtonColumn col = new ButtonColumn();
          col.CommandName = "select";
          col.ButtonType = ButtonColumnType.LinkButton;
          col.HeaderText = "Edit";
          dt.Columns.Add(col);
  </code></pre>