BikeInCity.App.SaveLocalCopy C# (CSharp) Method

        private void SaveLocalCopy(City city)
        {
            //provde invariant culture for serialization
              Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;

              using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
              {
            using (IsolatedStorageFileStream fs = isf.CreateFile("City.dat"))
            {
            XmlSerializer ser = new XmlSerializer(typeof(City));
              ser.Serialize(fs, city);
            }
              }
        }