在 System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   在 Quicker.Utilities.UI.PopupMgr.DetectCornerActions(Point pt)
   在 Quicker.Utilities.UI.PopupMgr.ProcessMouseMoveActions()
   在 Quicker.Utilities.UI.PopupMgr.MouseMoveThreadFunc()
   在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   在 System.Threading.ThreadHelper.ThreadStart()