DirectoryNotFoundException

StackTrace:

Frame	Image	Function	Offset
0	mscorlib.ni.dll	System.IO.__Error.WinIOError	0x00000000000000DC	
1	mscorlib.ni.dll	System.IO.FileSystemEnumerableIterator_1[[System.__Canon,_mscorlib]].CommonInit	0x000000000000010D	
2	mscorlib.ni.dll	System.IO.FileSystemEnumerableIterator_1[[System.__Canon,_mscorlib]]..ctor	0x00000000000001B3	
3	mscorlib.ni.dll	System.IO.DirectoryInfo.InternalGetFiles	0x0000000000000042	
4	mscorlib.ni.dll	System.IO.DirectoryInfo.GetFiles	0x0000000000000014	
5	Spaceketeer.exe	Spaceketeer.Controls.SpaceListBox.State_DirectoryChanged	0x0000000000000429	
6	mscorlib.ni.dll	System.EventHandler_1[[System.__Canon,_mscorlib]].Invoke	0x0000000000000002	
7	Spaceketeer.exe	Spaceketeer.Managers.StateManager.SelectDirectory	0x0000000000000044	
8	Spaceketeer.exe	Spaceketeer.Controls.SpaceGraph+__c._CreateDirectoryRing_b__10_0	0x000000000000004E	
9	PresentationCore.ni.dll	System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler	0x0000000000000030	
10	PresentationCore.ni.dll	System.Windows.RoutedEventArgs.InvokeHandler	0x000000000000002E	
11	PresentationCore.ni.dll	System.Windows.RoutedEventHandlerInfo.InvokeHandler	0x000000000000003F	
12	PresentationCore.ni.dll	System.Windows.EventRoute.InvokeHandlersImpl	0x00000000000000AE	
13	PresentationCore.ni.dll	System.Windows.UIElement.ReRaiseEventAs	0x0000000000000109	
14	PresentationCore.ni.dll	System.Windows.UIElement.OnMouseUpThunk	0x00000000000000C6	
15	PresentationCore.ni.dll	System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler	0x0000000000000030	
16	PresentationCore.ni.dll	System.Windows.RoutedEventArgs.InvokeHandler	0x000000000000002E	
17	PresentationCore.ni.dll	System.Windows.RoutedEventHandlerInfo.InvokeHandler	0x000000000000003F	
18	PresentationCore.ni.dll	System.Windows.EventRoute.InvokeHandlersImpl	0x00000000000000AE	
19	PresentationCore.ni.dll	System.Windows.UIElement.RaiseEventImpl	0x0000000000000073	
20	PresentationCore.ni.dll	System.Windows.UIElement.RaiseTrustedEvent	0x0000000000000046	
21	PresentationCore.ni.dll	System.Windows.UIElement.RaiseEvent	0x000000000000001A	
22	PresentationCore.ni.dll	System.Windows.Input.InputManager.ProcessStagingArea	0x0000000000000203	
23	PresentationCore.ni.dll	System.Windows.Input.InputManager.ProcessInput	0x0000000000000045	
24	PresentationCore.ni.dll	System.Windows.Input.InputProviderSite.ReportInput	0x0000000000000062	
25	PresentationCore.ni.dll	System.Windows.Interop.HwndMouseInputProvider.ReportInput	0x00000000000002D6	
26	PresentationCore.ni.dll	System.Windows.Interop.HwndMouseInputProvider.FilterMessage	0x00000000007D5060	
27	PresentationCore.ni.dll	System.Windows.Interop.HwndSource.InputFilterMessage	0x000000000000006B	
28	WindowsBase.ni.dll	MS.Win32.HwndWrapper.WndProc	0x000000000000009B	
29	WindowsBase.ni.dll	MS.Win32.HwndSubclass.DispatcherCallbackOperation	0x000000000000006B	
30	WindowsBase.ni.dll	System.Windows.Threading.ExceptionWrapper.InternalRealCall	0x0000000000000052	
31	WindowsBase.ni.dll	System.Windows.Threading.ExceptionWrapper.TryCatchWhen	0x0000000000000082	
32	WindowsBase.ni.dll	System.Windows.Threading.Dispatcher.LegacyInvokeImpl	0x0000000000000131	
33	WindowsBase.ni.dll	MS.Win32.HwndSubclass.SubclassWndProc	0x00000000000000EE	
34	WindowsBase.ni.dll	MS.Win32.UnsafeNativeMethods.DispatchMessage	0x0000000000000002	
35	WindowsBase.ni.dll	System.Windows.Threading.Dispatcher.PushFrameImpl	0x00000000000000B1	
36	WindowsBase.ni.dll	System.Windows.Threading.Dispatcher.PushFrame	0x000000000000004A	
37	PresentationFramework.ni.dll	System.Windows.Application.RunDispatcher	0x000000000000005A	
38	PresentationFramework.ni.dll	System.Windows.Application.RunInternal	0x0000000000000074	
39	PresentationFramework.ni.dll	System.Windows.Application.Run	0x000000000000002B	
40	Spaceketeer.exe	Spaceketeer.App.Main	0x0000000000000042