title: ORA-12154: TNS:could not resolve the connect identifier specified with c#.net and this_addins office & win8
body: <p>I've written this simple connection in my code:</p>
  
  <pre><code>OracleConnection con = new OracleConnection("data source=localhost;user id=fastecit;password=fastecit");
  con.Open();
  </code></pre>
  
  <blockquote>
    <p>error= ORA-12154: TNS:could not resolve the connect identifier specified</p>
  </blockquote>
  
  <p>project me c#.net and this_addins office &amp; win8</p>
  
  <p>why? </p>