Coding

Entity Framework Core – modern object-database mapper for .NET

EF Core is a modern object-database mapper for .NET.

It supports LINQ queries, change tracking, updates, and schema migrations. EF Core works with many databases, including SQL Database (on-premises and Azure), SQLite, MySQL, PostgreSQL, and Azure Cosmos DB. It supports other databases through a database provider plugin model.

EF Core is free and open source software.

Features include:

  • Creating a model:
    • Basic class mapping.
    • Constructors with parameters.
    • Property value conversions.
    • Mapped types with no keys.
    • Conventions.
    • Custom conventions.
    • Data annotations.
    • Fluent API.
    • Inheritance: Table per hierarchy.
    • Inheritance: Table per type.
    • Inheritance: Table per concrete class.
    • Shadow state properties.
    • Alternate keys.
    • Many-to-many navigations.
    • Many-to-many without join entity.
    • Key generation: Database.
    • Key generation: Client.
    • Complex/owned types.
    • Spatial data.
    • Model format: Code.
    • Create model from database: Command line.
    • Global query filters.
    • Table splitting.
    • Database scalar function mapping.
    • Database table valued function mapping.
    • Field mapping.
    • Nullable reference types.
  • Querying data:
    • LINQ queries.
    • Readable generated SQL.
    • GroupBy translation.
    • Loading related data: Eager.
    • Loading related data: Eager loading for derived types.
    • Loading related data: Lazy.
    • Loading related data: Explicit.
    • Raw SQL queries: Entity types.
    • Raw SQL queries: Keyless entity types.
    • Raw SQL queries: Composing with LINQ.
    • Explicitly compiled queries.
    • await foreach.
  • Saving data:
    • Change tracking: Snapshot.
    • Change tracking: Notification.
    • Change tracking: Proxies.
    • Accessing tracked state.
    • Optimistic concurrency.
    • Transactions.
    • Batching of statements.
    • Disconnected graph low-level APIs.
    • Disconnected graph End-to-end.
  • Other features:
    • Migrations.
    • Database creation/deletion APIs.
    • Seed data.
    • Connection resiliency.
    • Interceptors.
    • Events.
    • Simple Logging.
    • DBContext pooling.

Website: docs.microsoft.com/en-gb/ef
Support: GitHub Code Repository
Developer: .NET Foundation and Contributors
License: MIT License

Entity Framework Core is written in C#. Learn C# with our recommended free books and free tutorials.

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