InvalidOperationException: 序列不包含任何元素
StackTrace:
   在 System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
   在 IntelliTools.Domain.Menu.MenuFactory.GetFileGroupMenuWrapper(IEnumerable`1 fileList)
   在 IntelliTools.Domain.Menu.ClipRootFileMenuItemWrapper.<GetChildMenuItems>d__1.MoveNext()
   在 Cea.Utils.Extension.EnumerableExt.<DoLinq>d__2`1.MoveNext()
   在 System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   在 IntelliTools.Domain.Menu.MenuControlAdder.LoadSubmenuItem(IEnumerable`1 entries, Nullable`1 limit)
   在 IntelliTools.Domain.Menu.MenuItemWrapper.CreateSubmenu(OpenMenuType type)
   在 IntelliTools.Domain.Menu.MenuItemWrapper.<GetMenuItem>b__17_0(Object s, RoutedEventArgs e)
   在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   在 System.Windows.Controls.MenuItem.OnIsSubmenuOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   在 System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   在 System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   在 System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   在 System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   在 System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   在 System.Windows.DependencyObject.SetCurrentValueInternal(DependencyProperty dp, Object value)
   在 System.Windows.Controls.MenuItem.OpenMenu()
   在 System.Windows.Controls.MenuItem.<SetTimerToOpenHierarchy>b__189_0(Object sender, EventArgs e)
   在 System.Windows.Threading.DispatcherTimer.FireTick(Object unused)
   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)