问题描述
有人可以使用Windows Phone 8的这些控件确认故事吗?
Can someone please confirm the story with these controls for Windows Phone 8?
我的理解(并希望)是，SDK8的ProgressBar控件不再存在性能问题，并且无需在工具箱中使用PerformanceProgressBar(尽管它显然仍然存在).
My understanding (and hope) is that the ProgressBar control with SDK8 no longer has perf problems and that there is no need to use PerformanceProgressBar in the toolkit (although it is still there evidently).
(唯一的区别是PerformanceProgressBar不需要您通过Visibility属性使它不可见，但是ProgressBar确实需要这样做，否则将有一条永久的可见线.)
(The only difference is that PerformanceProgressBar did not require you to make it invisible with the Visibility property, but ProgressBar does require this or there will be a permanent visible line.)
或者，ProgressBar在实现上是否仍然存在问题，我们仍应坚持使用PerformanceProgressBar?
Or, is ProgressBar still a problem in its implementation and we should still stick to PerformanceProgressBar?
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