最近在琢磨MVC和EntityFramework,使用的VS是2013版的，在Nuget的GUI界面下安裝了EntityFramework(默認安裝最新版的，怎么安裝指定版本還沒找到),按照MVC的示例項目MusicStore逐步做的過程中發(fā)現(xiàn)MVC4不支持EntityFramwok 6。

嘗試去更新MVC版本各種失敗，只能試著去降低EntityFramework版本。但是通過Nuget的GUI界面無法安裝或更新到指定版本的EntityFramwok。在網(wǎng)上搜了搜相關(guān)資料（事實上也很容易搜到），做個備忘。

首先打開程序包管理器控制臺：工具→Nuget程序包管理器→程序包管理器控制臺

打開如下圖所示的命令行界面

安裝指定版本的Package(例如：EntityFramework 5.0)：

PM> Install-Package EntityFramework -ProjectName MusicStore -Version 5.0

更新到指定版本的Package(例如EntityFramewrok 6.0):

PM> Update-Package EntityFramework -ProjectName MusicStore -Version 6.0 Update-Package命令相關(guān)參數(shù)說明：? ParameterTypeDescription

-Id	string	Specifies the Id of the package to be updated.
-ProjectName	string	Specifies the name of the project in which packages should be updated.
-Version	SemanticVersion*	Specifies the new target version of the package as a result of the update.
-Source	string	Specifies where to look for package updates, overriding the package sources that are specified in the Options dialog. This value can be either a url to a remote repository or a path to a local repository or the name of a package source specified in the Options dialog.
-IgnoreDependencies	Switch parameter	If set, NuGet will ignore dependency packages and only update the main package.
-Safe	Switch parameter	If set, NuGet will only update to a new version that has the same major and minor versions as the previous package. For example, if the old version is 1.2.0, NuGet will accept the update package with version of 1.2.1 or 1.2.9999 but it will?notaccept 1.3.0.
-IncludePrerelease	Switch parameter	If set, NuGet will consider prerelease packages as candidates for updates.
-Reinstall	Switch parameter	If set, instead of updating the package to the latest version, NuGet will uninstall the package and reinstall the same version. This is useful when, for example, you've updated the target framework of your project, e.g. from .NET 4.0 to .NET 4.5, and you want to reference .NET 4.5-specific assemblies in the package. You can't set this parameter together with the -Version parameter.

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