Use Linq In Global.asax in asp.net

<%@ Application Language="C#" %>

<%@ Import Namespace="System.Xml.Linq" %>

<%@ Import Namespace="System.Linq" %>

<script runat="server">

    void Session_End(object sender, EventArgs e)

    {

        MyLinqDataClassesDataContext mylinq = new MyLinqDataClassesDataContext(); 

        if (Session["uname"] != null)

        {

        var deleteuser = from p in mylinq.userCredentials

                         where p.uname_db.Contains(Session["uname"].ToString())

                         select p;           

            mylinq.userCredentials.DeleteAllOnSubmit(deleteuser);

            mylinq.SubmitChanges();

        }

    }

</script>