使用NuGet安装EntityFramework4.2

1、下载NuGet

有两种方式下载NuGet

第一种：在微软的档案库下载，下载地址为：http://visualstudiogallery.msdn.microsoft.com/27077b70-9dad-4c64-adcf-c7cf6bc9970c?SRC=VSIDE

弟二种：在vs2010的Tools中Extension Manager-》OnlineGallery 中搜索NuGet并下载安装

2、安装NuGet

在安装NuGet时，遇到了一个错误

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.

解决方案：卸载PowerShell 1.0

卸载后，能正确的安装成功

3、安装EntityFramework4.2

在 Package Manager Console 中 运行Install-Package EntityFramework

遇到错误

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
 解决方案：

修改package Source为：http://packages.nuget.org/v1/FeedService.svc/