efcore
https://github.com/dotnet/efcore
C#
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
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- Issues
- ComplexCollection + ToJson(): DetectChanges throws "must be initialized to a non-null value" when a nullable nested complex property containing a collection is set to null
- Required owned entity on a TPH derived type is materialized for an unrelated row
- Allow safe numerical comparisons across types
- JSON mapping via complex types is significantly slower than via owned entities for nested hierachies
- Allow providers to overwrite structural type scalar property order
- Query: whole non-entity object from a plain (non-aggregated) LeftJoin/DefaultIfEmpty inner is not nulled on no-match
- Cosmos: equality on a hierarchical partition-key prefix is lifted out of WHERE into the partition hint, forgoing the index and scanning the physical partition
- Cosmos: Handle late discriminators in materialization
- Query translation fails when `Where` references a projection guarded by `child != null && grandChild != null`
- Problem with SQLitePCLExtensions.EncryptionSupported and GetNativeLibraryName
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- C# not yet supported