使用NuGet安裝EntityFrameWork4.2
1、下載NuGet
有兩種方式下載NuGet
第一種：在微軟的檔案庫下載，下載地址為：http://visualstudiogallery.msdn.microsoft.com/27077b70-9dad-4c64-adcf-c7cf6bc9970c?SRC=VSIDE
弟二種：在vs2010的Tools中Extension Manager-》OnlineGallery 中搜索NuGet並下載安裝
2、安裝NuGet
在安裝NuGet時，遇到了一個錯誤
Error: The Package Manager Console requires PowerShell 2.0 runtime, which is not detected on this machine.
Please install the PowerShell 2.0 from http://support.microsoft.com/kb/968929 and restart Visual Studio.
解決方案：卸載PowerShell 1.0
卸載后，能正確的安裝成功
3、安裝EntityFramework4.2
在 Package Manager Console 中 運行Install-Package EntityFramework
遇到錯誤
Install-Package : The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.
At line:1 char:16
+ Install-Package <<<< EntityFramework
+ CategoryInfo : NotSpecified: (:) [Install-Package], WebException
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand
解決方案：
修改package Source為：http://packages.nuget.org/v1/FeedService.svc/