title: Check if value exist in datatable
body: <p>i have sql command and I save values into datatable.</p>
  
  <pre><code>con.Open();
  cmd0.CommandText = "Select ......";
  DataTable dtbl = new DataTable();
  dtbl.Load(cmd0.ExecuteReader());
  </code></pre>
  
  <p>And i have value String Name.
  I need to know, if the value in String Name is in the datatable dtbl...It is possible?</p>