EF 6.1.0 Beta 1 Available

Since the release of EF6 our team has started working on the EF6.1 release. This is our next release that will include new features.


What’s in Beta 1?

Entity Framework 6.1 is a minor update to Entity Framework 6 and includes a number of bug fixes and new features. The new features in this release include:

  • 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.
  • Handling of transaction commit failures provides the new System.Data.Entity.Infrastructure.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.
  • IndexAttribute allows 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.
  • 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.
  • Ability to configure interceptors via the App/Web.config file (allowing interceptors to be added without recompiling the application).
  • Migrations model change detection has been improved so that scaffolded migrations are more accurate; performance of the change detection process has also been greatly enhanced.
  • Performance improvements including reduced database operations during initialization, optimizations for null equality comparison in LINQ queries, faster view generation (model creation) in more scenarios, and more efficient materialization of tracked entities with multiple associations.


Where do I get the beta?

The runtime is available on NuGet. Follow the instructions on our Get It page for installing the latest pre-release version of Entity Framework runtime.

The tooling for Visual Studio 2012 and 2013 is available on the Microsoft Download Center.



This is a preview of features that will be available in the final release of EF6.1 and is designed to allow you to try out the new features and report any issues you encounter. Microsoft does not guarantee any level of support on this release.

If you need assistance using the new features, please post questions on Stack Overflow using the entity-framework tag.


Thank you to our contributors

We’d like to say thank you to folks from the community who contributed features, bug fixes, and other changes to the 6.1 release - RogerAlsing, ErikEJ, and mikecole.

In particular, we’d like to call out the following contributions:

  • Support for String.Concat and .ToString in LINQ queries (RogerAlsing)
  • Support for enum HasFlags method in LINQ queries (RogerAlsing)
  • Entity SQL canonical function support for SQL Server Compact (ErikEJ)
  • Fix for a bug that was affecting EF running under Mono (ErikEJ)


What’s next?

All the features we plan to include in the final release of EF6.1 are included in this Beta. At this stage our team is tidying up a few things with the new features and fixing any high priority bugs that are reported.