非UI“调用线程无法访问此对象，因为不同的线程拥有它”

I have the following code:

我有以下代码：

var queue = printer.PrintQueue;
var canPrint = ! Dispatcher.CurrentDispatcher.Invoke(()
                            => queue.IsPaperJammed || queue.IsOutOfPaper || 
                               queue.IsInError || queue.HasPaperProblem);
var queu