I have created a fresh project in MVC3. Jquery is already referenced in Layout view but vs-doc intellegence is not coming.

I have created a fresh project in MVC3. Jquery is already referenced in Layout view but vs-doc intellegence is not coming.

try referencing jquery-1.5.1.js in Same file where you want intelligence.
<script src="../../Scripts/jquery-1.5.1.js" type="text/javascript"></script>
@if (false)
{
<script src="../../Scripts/jquery-1.5.1.min.js" type="text/javascript"></script>
<script src="../../Scripts/jquery-ui.min.js" type="text/javascript"></script>
}
In this way intelligence will work and js file will not be downloaded to client.