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ADO.NET Entity Framework 4.1 introduces two new features:

• The DbContext API is a simplified abstraction over ObjectContext and a number of other types that were included in previous releases of the ADO.NET Entity Framework. The DbContext API surface is optimized for common tasks and coding patterns.
• Code First is a new development pattern for the ADO.NET Entity Framework and provides an alternative to the existing Database First and Model First patterns. Code First is focused around defining your model using C#/Visual Basic .NET classes, these classes can then be mapped to an existing database or be used to generate a database schema. Additional configuration can be supplied using Data Annotations or via a fluent API.

Update 1 includes a small set of changes including:

• Bug fix to remove the need to specify ‘Persist Security Info=True’ in the connection string when using SQL authentication. In the EF 4.1 release ‘Persist Security Info’ was required for Code First to be able to create a database for a connection using SQL Authentication. The update includes a fix to remove this requirement. Note that ‘Persist Security Info’ is still required if you construct a DbContext using a DbConnection instance that has already been opened and closed.
• Introduction of new types to facilitate design-time tools for Code First. Update 1 introduces a set of types to make it easier for design time tools to interact with derived DbContexts:
  • DbContextInfo can be used to instantiate and interact with a derived context as well as determine information about the origin of the connection string etc..
  • IDbContextFactory is used to let DbContextInfo know how to construct derived DbContext types that do not expose a default constructor. If your context does not expose a default constructor then an implementation if IDbContextFactory should be included in the same assembly as your derived context type.

Files

Status: Deleted This download is no longer available on microsoft.com. The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to September 2018.

Files
EF4.1 Release Notes.rtf
EntityFramework41.exe SHA1: e7c610163c5b68eb35e0574c2b8aaec41e2362c4 Size: 631 KB
License.rtf

File sizes and hashes are retrieved from the Wayback Machine’s indexes. They may not match the latest versions of files hosted on Microsoft servers.

x86; x64

ADO.NET Entity Framework 4.1 - Update 1 requires .NET Framework 4.0 RTM to be installed.

Microsoft ADO.NET Entity Framework 4.1 - Update 1 is subject to license terms that must be agreed to prior to use.

Download and run EntityFramework41.exe