不知道如何處理的Windows Phone異常

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後台收到這麼一段異常資訊，從下文中看是SQL Server Compact database出錯了，但怎麼出錯的，為什麼會出錯，如何避免？ 沒有一點辦法，如果您fix過這種問題，懇請指點迷津，謝謝！

SQLCE_DbConnectionFailed;Unable to connect to shared memory region of the SQL Server Compact database. This is because of another process, owning the shared memory region lock, has exited abnormally in the lock acquired state.  This is an intermittent problem. Closing and restarting the database connection should fix the problem. [ Thread id = 3340,Process id = 2544,Db name = C:\Data\Users\DefApps\AppData\{C8E66617-1EAC-4AED-A6E3-09F307353AC1}\Local\SQLCE.sdf,Lock type = SPLK ]   at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)   at System.Data.SqlServerCe.SqlCeCommand.CompileQueryPlan()   at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)   at System.Data.SqlServerCe.SqlCeCommand.ExecuteDbDataReader(CommandBehavior behavior)   at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult, Boolean isCompiledQuery)   at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries, Boolean isCompiledQuery)   at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)   at System.Data.Linq.DataQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source)   at xxx.Mobile.WindowsPhone.StorageHelper.Cleanup(SByte days)   at xxx.Mobile.WindowsPhone.App.Application_Closing(Object sender, ClosingEventArgs e)   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)   at Microsoft.Phone.Shell.PhoneApplicationService.FireClosing()   at Microsoft.Phone.TaskModel.Interop.ITask.Closing.Invoke()   at Microsoft.Phone.TaskModel.Interop.Task.FireOnClosing()