尝试用VS2010--工具--Library Package Manager--Add Library Package Reference的online搜索 EntityFramework, 再找到的结果中,点选该Package的Install, 却提示错误: "This package (or one of its dependencies) contains powershell scripts and needs to be installed from the package manager console." 根据提示改用Package Manager Console来安装, 打开VS2010--工具--Library Package Manager--Package Manager Console, PM > get-package -remote -filter entityframework Id Version Description -- ------- ----------- EFCodeFirst 1.0 Legacy package, Code F... EntityFramework 4.1.10311.0 DbContext API and Code... EntityFramework.Sample 4.1 This sample blog model... EntityFramework.SqlServ... 4.1.8482.1 Allows SQL Server Comp... EntityFrameworkProfiler 1.0.0.836 EntityFramework Profil... PM > install-package -id EntityFramework -Version 4.1.10311.0 You are downloading EntityFramework from Microsoft, the license agreement to which is available athttp://go.microsoft.com/fwlink/?LinkID=211009. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device. Successfully installed 'EntityFramework 4.1.10311.0' Successfully added 'EntityFramework 4.1.10311.0' to ....... VS2010安装 EntityFramework 如果在Add Library Package Reference安装失败只需三步 :) 打开VS2010--工具--Library Package Manager--Package Manager Console, PM > get-package -remote -filter entityframework（在PM>输入get-package -remote -filter entityframework） PM > install-package -id EntityFramework -Version 4.1.10311.0（同上