[错误解决]Package restore is disabled by default. To give consent, open the Visual Studio Options dialog

错误提示：

 Package restore is disabled by default. To give consent, open the Visual Studio Options dialog, click on Package Manager node and check 'Allow NuGet to download missing packages during build.' You can also give consent by setting the environment variable 'EnableNuGetPackageRestore' to 'true'. ProductStore

解决：

 VS2010 工具---选项----包管理器---允许NuGet在生成期间下载缺少的程序包