你好,
升级至Update2之后,新建WP项目会有两种模板。

如果选择的是第一个模板,则创建的项目是黑色背景,并且无信号,电源等显示。如果是选择下面用黄色框起来的模板,是可以看到黑色背景加信号电源。
通过Toolbox添加的控件无法显示,建议通过XAML代码添加控件,看是是否显示;
如果不行,建议你以管理员身份运行。重新编译该项目。
希望我的回复能够帮助你!
谢谢!
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