protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);

            DivePlanData data = SerializerHelper.DeSeralize<DivePlanData>("DivePlanData.xml");
            if (data == null)
            {
                data = new DivePlanData();
            }

            this.WayPoints.Children.Clear();
            foreach (WayPoint wayPoint in data.WayPoints)
            {
                TextBlock txt = new TextBlock();
                txt.Text = wayPoint.ToString();
                this.WayPoints.Children.Add(txt);
            }

            this.DecoGas.Children.Clear();
            foreach (Gas gas in data.DecoGas)
            {
                var decoDepth = DiveLibrary.Calculations.MaximumOperatingDepth(gas.OxygenProcent, 1.6);
                TextBlock txt = new TextBlock();
                txt.Text = gas.ToString() + "MOD " + decoDepth;
                this.DecoGas.Children.Add(txt);
            }
        }
        private void AddButton_Click(object sender, RoutedEventArgs e)
        {
            DivePlanData data = SerializerHelper.DeSeralize<DivePlanData>("DivePlanData.xml");
            if (data == null)
            {
                data = new DivePlanData();
            }

            data.DecoGas.Add(new Gas((double)this.oxygen / 100.0, (double)this.helium / 100.0));

            SerializerHelper.Serialize<DivePlanData>("DivePlanData.xml", data);
            this.NavigationService.GoBack();
        }