title: DataTable Filter From Code Side C#
body: <p>I have a DataTable which I get by an upload of CSV document from the user and has columns, rows like that:</p>
  
  <pre><code>Email      Age      Team
  x@x.com    25       BarcelonaFC
  y@y.com    32       BesiktasJK
  z@z.com    18       Napoli
  y@y.com    19       Boca Juniors
  x@x.com    36       Internazionale
  </code></pre>
  
  <p>I need to filter that datatable before I insert it into the database. Email column should be unique. So I need to filter that datatable so that I get as a result eliminating 2 rows. I do not want to use LINQ, but if it is only solution, its ok.</p>
  
  <pre><code>Email      Age      Team
  x@x.com    25       BarcelonaFC
  y@y.com    32       BesiktasJK
  z@z.com    18       Napoli
  </code></pre>