title: Convert DataType of last row in Datatable for export to Excel
body: <p>Is there any way to turn Datatype of the only last row  When I want to export excel from Datatable?</p>
  
  <pre><code> dataTable.Columns("ColumnA").DataType = System.Type.GetType("System.String")
  </code></pre>
  
  <p>It seems that Datatype just only can be used by Columns....?
  Thanks in advance!</p>