Hi,
Make sure that you have added a reference to these files in your HTML
<link href="~/Scripts/jquery-ui-1.11.0.custom/jquery-ui.min.css" rel="stylesheet" />
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script src="~/Scripts/jquery-ui-1.11.0.custom/jquery-ui.min.js"></script>
Html code will be,
<div class="row">
Date: <input type="text" id="picker">
</div>
<!--
<script>
$(document).ready(function () {
$("#picker").datepicker();
});
</script>
Hope this will help you..