解决方法
有一种方法 – 您必须使用XNA显示MessageBox
有几篇文章 –
> http://www.danielmoth.com/Blog/GuideBeginShowMessageBox-Wrapper.aspx(感谢@mrlacey/@wpug的链接)
> http://dotnet.dzone.com/articles/delivering-message-using
MessageBoxIcon is in fact not an icon (yeah,I know – the name says so). On Windows Phone 7,it will define the short sound that will accompany the message. And here you have several choices: Alert,None,Error,Warning
但是,请注意,使用XNA方法有点尴尬,因为它们是非阻塞方法(您可能还需要查看它们如何与后退按钮进行交互)
有些人也写了自己的留言箱 – 例如http://blogs.microsoft.co.il/blogs/tomershamam/archive/2010/10/19/windows-phone-7-custom-message-box.aspx