dotnet/Documentation/compatibility/ef-version-must-match-netfx-version.md

Entity Framework version must match the .NET Framework version

Scope

Major

Version Introduced

4.5

Source Analyzer Status

Planned

Change Description

The entity framework version should be matched with the .NET framework version. Entity Framework 5 is recommended for .NET 4.5. There are some known issues with EF 4.x in a .NET 4.5 project around xref:System.ComponentModel.DataAnnotations. In .NET 4.5, these were moved to a different assembly, so there are issues determining which annotations to use.

• Quirked
• Build-time break

Recommended Action

Upgrade to Entity Framework 5 for .NET Framework 4.5

Affected APIs

• Not detectable via API analysis

Category

Entity Framework

More information