#### to do
##### fundamentals (41)
* connection strings
* connection resiliency
* testing => sqlite, inmemory
* configuring a dbcontext ?
* nullable reference types => navigating (include, theninclude)
##### creating a model (42)
* entity types, entity properties, keys, generated values, backing fields?
* initialization strategy, seeding data
* shadow properties
* ###### relationships
  * single navigation property
  * cascade delete
  * one to one
  * one to many
  * many to many
  * foreign key
  * required and optional relationships
  * indexes?
* ###### inheritance
  * TPH
  * discriminator configuration
  * shared columns
* sequences?
* value conversion
* entity type constructors
* table splitting and table sharing?, owned types?
* keyless entity types?
* alternating model with same DbContext?
* spatial data?
##### managing database schemas + migrations (43)
* migrations
* create and drop APIs
* reverse engineering?
##### querying data: LINQ to SQL (44)
* loading all entity, loading a single entity, filtering
* client vs. server evaluation
* tracking vs. no-tracking
* complex query operators (join, groupjoin, selectmany, groupby, leftjoin)
* ###### loading related data (include, theninclude...)
  * eager loading
  * explicit loading
  * lazy loading
  * related data and serialization?
* asynchronous queries?
* raw sql queries?
* global query filters?
* query tags?
* how queries work
##### saving data (44)
* basic save (adding, removing, updating, multiple changes)
* related data (a graph of new entities, a related entity, changing or removing relationships)
* cascade delete
* concurrency conflicts
* transactions
* asynchronous saving?
* disconnected entities?
* setting explicit values for generated properties?
##### database providers (45)
* microsoft sql server
* sqlite
* cosmos?
* inmemory (for testing)
##### optional
* logging
* supported .NET implementations