LINQ to Entities does not recognize the method 'System.Object get_Item(System.String)' method, and this method cannot be translated into a store expression

ServerError in '/' Application.

LINQ to Entities doesnot recognize the method 'System.Object get_Item(System.String)' 
method, andthis method cannot be translated into a store expression.

A Linq query is translated to SQL to be performed against the database. Make sure you need to assign session or form request to a variable first because that has no access to it, and use this variable in the query.

int userId = (int)Session["UserId"];

 var hasrecord = db.Submits
                          .Where(m =>m.Published == false && m.CreatedUserId ==userId)
                                .OrderByDescending(m => m.SubmitId);