Tim Laverty – Diego Vega – Program Managers Microsoft Corporation SESSION CODE: DEV305

Data Access Framework Database Business logic, UI, etc. Repository Data Access Framework Database

Repository ObjectContext Database Business logic, UI, etc. Fake Repository In-memory data Real Repository Fake for context interface In-memory data

Data Access Database Presentation Business logic

EF Startup Loads Model Metadata Generates EF Query Views (or upon first query) First Time Query Execution EF Query Translation EF Query Caching Manual with LINQ queries. Result Shaper Caching

Expensive 1 st time Cached Compile Query Large data No Updates! Projection Separate Queries EF offers fixup Stored Procs/Views Not Composable Round trips Lazy Loading Multiple Queries Connection Overuse Danger! Use Include No Updates! Use NoTracking

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