title: copy a single row from one datatable to other
body: <p>I have two datatables one has few rows other is empty.
  I am running a loop over first one to copy some of the rows to another table.
  I am getting error 'The row already belongs to another table'.</p>
  
  <p>Is there any way to copy DataRows one by one to other DataTable.</p>
  
  <p>thanks in advance</p>