| EF（or EF3.5） |
Visual Studio 2008 SP1 (.NET 3.5 SP1) |
基本的O/R對映支援，使用DB First開發模式 |
| EF 4 |
Visual Studio 2010 (.NET 4.0) |
支援POCO實體 |
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延遲載入 |
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提高單元測試能力 |
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自定義的程式碼生成機制 |
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支援Model First開發模式 |
| EF 4.1 |
NuGet |
提供簡化的DbContext介面 |
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支援Code First開發模式 |
| EF 4.1.1 |
過渡版本 |
支援Power Tools工具 |
| EF 4.2 |
過渡版本 |
解決bug並優化 |
| EF 4.3 |
Visual Studio 2010 (.NET 4.0) |
基於Code First開發模式的程式碼遷移策略 Migrations |
| EF 4.3.1 |
Visual Studio 2012 (.NET 4.5) |
提供對 LocalDb 資料庫的支援 |
| EF 5 |
Visual Studio 2012 (.NET 4.5) |
提供對列舉型別的支援 |
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Table-Valued functions表值函式 |
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空間資料型別（spatial types） |
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整體效能優化提升 |
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實體模型設計器、多圖模型 |
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批量匯入儲存過程 |
| EF 6 |
Visual Studio 2013 (.NET 4.5) |
Power Tools加強 |
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EF脫離Visual Studio和.NET通過NuGet單獨釋出 |
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可配置不穩定連線的重試次數等 |
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支援.NET 4.5中基於Task的非同步程式設計模式 Async Query and Save |
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優化的配置選項 Code-Based Configuration |
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支援依賴注入和服務定位 Dependency Resolution |
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低階的EF攔截器及SQL日誌 Interception/SQL Loggin |
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使用Mock單元測試 |
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using a mocking framework or writing your own test doubles |
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使用已有的DbConnection建立DbContext |
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提升事務支援 Improved Transaction Support |
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優化LINQ to Entities查詢效能 |
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優化(View Generation)效能 |
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支援自定義實現Entity的Equals和GetHashCode方法 |
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DBSet.AddRange/RemoveRange |
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DbChangeTracker.HasChanges |
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擴充套件的SqlFunctions，SqlCeFunctions |
| EF 6.0.1 |
Visual Studio 2013 (.NET 4.5) |
fix some performance issues during warm-up for EF models. |
| EF 6.0.2 |
Visual Studio 2013 (.NET 4.5) |
The tooling for Visual Studio 2012 and Visual Studio 2013 is |
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available on the Microsoft Download Center. You only need to |
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install the tooling if you want to use Model First or Database First |
| EF 6.1 |
Visual Studio 2013 (.NET 4.5) |
Tooling consolidation provides a consistent way to create a new EF model. This feature extends the ADO.NET Entity Data Model wizard to support creating Code First models, including reverse engineering from an existing database. These features were previously available in Beta quality in the EF Power Tools. |
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Handling of transaction commit failures provides the CommitFailureHandler which makes use of the newly introduced ability to intercept transaction operations. The CommitFailureHandler allows automatic recovery from connection failures whilst committing a transaction |
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IndexAttributeallows indexes to be specified by placing an [Index] attribute on a property (or properties) in your Code First model. Code First will then create a corresponding index in the database |
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The public mapping API provides access to the information EF has on how properties and types are mapped to columns and tables in the database. In past releases this API was internal |