Update v11

[2466254711]

Hello， 
  This is a new crash code I found while clicking the airport button in the demand page.


Game time:2018/1/4 0:00:00
2018/3/23: 8:47 System.NullReferenceException: 未将对象引用设置到对象的实例。
   在 TheAirlineProjectV2.Modules.Airport.ViewModels.AirportViewModel.setProperties() 位置 C:\Users\Christian\Documents\Visual Studio 2017\Projects\TheAirlineProjectV2\TheAirlineProjectV2.Modules.Airport\ViewModels\AirportViewModel.cs:行号 146
   在 TheAirlineProjectV2.Modules.Airport.ViewModels.AirportViewModel.set_CurrentAirport(Airport value) 位置 C:\Users\Christian\Documents\Visual Studio 2017\Projects\TheAirlineProjectV2\TheAirlineProjectV2.Modules.Airport\ViewModels\AirportViewModel.cs:行号 127
   在 TheAirlineProjectV2.Modules.Airport.Controllers.AirportController.AirportChanged(String id) 位置 C:\Users\Christian\Documents\Visual Studio 2017\Projects\TheAirlineProjectV2\TheAirlineProjectV2.Modules.Airport\Controllers\AirportController.cs:行号 62
   在 Prism.Events.EventSubscription`1.<>c__DisplayClass11_0.<GetExecutionStrategy>b__0(Object[] arguments)
   在 Prism.Events.EventBase.InternalPublish(Object[] arguments)
   在 TheAirlineProjectV2.GraphicsControls.Commands.AirportCommand.OnExecute(Object parameter) 位置 C:\Users\Christian\Documents\Visual Studio 2017\Projects\TheAirlineProjectV2\TheAirlineProjectV2.GraphicsControls\Commands\AirportCommand.cs:行号 26
   在 FirstFloor.ModernUI.Presentation.CommandBase.Execute(Object parameter)
   在 MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   在 System.Windows.Documents.Hyperlink.OnClick()
   在 System.Windows.Documents.Hyperlink.DoUserInitiatedNavigation(Object sender)
   在 System.Windows.Documents.Hyperlink.OnMouseLeftButtonUp(Object sender, MouseButtonEventArgs e)
   在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   在 System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   在 System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   在 System.Windows.ContentElement.RaiseTrustedEvent(RoutedEventArgs args)
   在 System.Windows.Input.InputManager.ProcessStagingArea()
   在 System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   在 System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   在 System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   在 System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   在 System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   在 MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   在 MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   在 System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   在 MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   在 MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   在 System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   在 System.Windows.Application.RunDispatcher(Object ignore)
   在 System.Windows.Application.RunInternal(Window window)
   在 TheAirlineProjectV2.App.Main()