Uninstalling Windows Mobile application doesn't remove file in IsolatedStorageFile

Question

i have windows phone 8 application. i installed this application in a device running windows 10 mobile. after uninstalling application from device i found that the my sqlite db file exists in IsolatedStorageFile

IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();
store.FileExists(dbName)  // returns true

i added this file to storage through this method:

Assembly assem = Assembly.GetExecutingAssembly();
CopyFromContentToStorage(assem.FullName.Substring(0, assem.FullName.IndexOf(',')), dbName);

    private void CopyFromContentToStorage(String assemblyName, String dbName)
    {
        IsolatedStorageFile store =
            IsolatedStorageFile.GetUserStoreForApplication();
        System.IO.Stream src =
            Application.GetResourceStream(
                new Uri("/" + assemblyName + ";component/" + dbName,
                        UriKind.Relative)).Stream;
        IsolatedStorageFileStream dest =
            new IsolatedStorageFileStream(dbName,
                System.IO.FileMode.OpenOrCreate,
                System.IO.FileAccess.Write, store);
        src.Position = 0;
        CopyStream(src, dest);
        dest.Flush();
        dest.Close();
        src.Close();
        dest.Dispose();
    }

i tested this app on two devices that running windows phone 8 * 8.1 . but it works correctly on those devices;

is this a bug in windows mobile 10 or i must change my code?