LocalStorage for .net is NULL and The process cannot access because it is being used by another process.

[LonelyLonely12]

I have some problem When multiple users will encounter this problem.

My Controller : When the user enters for the first time

public class ShoppingCart { public string ProductID { get; set; } public string Amount { get; set; } }

public ActionResult Index() { var uuid = Guid.NewGuid().ToString(); List<ShoppingCart> ShoppingCartList = new List<ShoppingCart>(); var storage = new LocalStorage();-----------(1) storage.Store(uuid , ShoppingCartList ); storage.Persist();

ShoppingCartList = storage.Get<List<ShoppingCart>>(uuid); -----------(2) int Amount = ShoppingCartList.Count; return View(); }

line --(1) error : System.IO.IOException: The process cannot access the file 'C:\xxx\yyy\zzz\ .localstorage' because it is being used by another process.

line --(2) error : System.NullReferenceException: Object reference not set to an instance of an object.

Both errors are not always present. Where am I going wrong?