var query = from c in gbcnt.tbGuestBook select c

foreach(var tbguest in query)
{
	Response.Write(tbguest.Message);
}

  IEnumerable enumerble = (from c in gbcnt.tbGuestBook select c).ToList();
 		foreach(tbGuestBook em in enumerble)
            {
                Response.Write(em.Message);
            }
           	 foreach(tbGuestBook em in enumerble)
            {
                Response.Write(em.Message);
            }

       var query = from c in ctx.Customers select c;
 
        var newquery = (from c in query select c).OrderBy(c => c.CustomerID);