Visual studio 2012 安装程序包：无法安装程序包WPtoolkit错误

可能重复：

在尝试安装WPtoolkit时，出现以下错误

PM> Install-Package WPtoolkit
Successfully installed 'WPtoolkit 4.2012.10.30'.
Successfully uninstalled 'WPtoolkit 4.2012.10.30'.
Install failed. Rolling back...
Install-Package : Could not install package 'WPtoolkit 4.2012.10.30'. You are trying to install this package into a project that targets 'WindowsPhone,Version=v8.0', but the packag
e does not contain any assembly references that are compatible with that framework. For more information, contact the package author.
At line:1 char:1

我有什么遗漏吗？ NuGet也更新到了最新版本…

哈哈

在常见问题部分

Q-我有WP8 SDK，我安装了NuGet软件包，它仍在安装工具包程序集的7.1版本，或者我收到一个错误—“您正试图将此软件包安装到一个以“WindowsPhone，version=v8.0”为目标的项目中，但该软件包不包含任何与该框架兼容的程序集引用。”

A – You have an older version of NuGet. 
Install the latest NuGet from www.NuGet.org . Close and restart all the 
instances of Visual Studio. 
Now install the package. It will install correctly. 
WP8 projects are supported from Nuget 2.1 onwards.

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在这之后，转到xaml页面类型，消息清楚地表明该库与WP8不兼容