StockContext context = new StockContext();
 User user = context.Users.Where( uss => uss.Pk == 1).SingleOrDefault();
 Response.Write(user.FullName + "<br>"); 
 user.FullName = user.FullName + "!";
 
 
 StockContext context2 = new StockContext();
 User user2 = context.Users.Where(uss => uss.Pk == 1).SingleOrDefault();
 Response.Write(user2.FullName + "<br>");
 user2.FullName = user2.FullName + "!";