NullReferenceException: Object reference not set to an instance of an object.
StackTrace:
   at DynamicClass.CountdownTimer.<Timer_Tick>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   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)

NullReferenceException: Object reference not set to an instance of an object.
StackTrace:
   at IntelliTools.Domain.MyClipboard.ImageClipItem.Val_GetHashCode()
   at IntelliTools.Domain.MyClipboard.ClipItemBaseComparer.GetHashCode(ClipItem obj)
   at System.Collections.Generic.HashSet`1.InternalGetHashCode(T item)
   at System.Collections.Generic.HashSet`1.AddIfNotPresent(T value)
   at IntelliTools.View.Clipboard.ClipItemListControl.DistinctItems()
   at IntelliTools.Domain.Menu.MenuItemWrapper.InternalClick(Object sender, RoutedEventArgs args)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.Controls.MenuItem.InvokeClickAfterRender(Object arg)
   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)

NullReferenceException: Object reference not set to an instance of an object.
StackTrace:
   at DynamicClass.cc.<>c__DisplayClass140.<<初始化>b__9f>d__192.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   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)

NullReferenceException: Object reference not set to an instance of an object.
StackTrace:
   at Quicker.App.<>c__DisplayClass28_0.aZ5PEawI4CK()
   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)