ArgumentNullException: Value cannot be null.
Parameter name: first
StackTrace:
   at System.Linq.Enumerable.SequenceEqual[TSource](IEnumerable`1 first, IEnumerable`1 second, IEqualityComparer`1 comparer)
   at IntelliTools.Domain.MyClipboard.FileClipItem.Val_Equals(ClipItemBase other)
   at IntelliTools.View.BackgroundWindow.CollectClipItem(ClipItemBase item)
   at IntelliTools.View.BackgroundWindow.LasyOnClipboardChanged()
   at IntelliTools.View.BackgroundWindow.Timer_Tick(Object sender, EventArgs e)
   at System.Windows.Threading.DispatcherTimer.FireTick(Object unused)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)