Exception:解析表达式出错。 内部错误：Oops! No applicable member has been found for the expression. The error occurred for expression "." at position 25 near ".FirstItemTimestamp()} <=". 原始表达式：DateTime.Now - {Clipboard.FirstItemTimestamp()} <= TimeSpan.FromMinutes(1) //这个表达式尝试判断剪贴板的第一项内容是否来源于最近1分钟内的复制操作 开始位置：25 附近代码：.FirstItemTimestamp()} <=