Earthworm - An ORM for Esri Geodatabase (via ArcObjects)

A simple .NET assembly that provides an object-relational mapping abstraction layer for geodatabase feature classes and tables. It converts features and rows into a (lazy) sequence of strongly-typed objects.

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• Fights the impedance mismatch between geodatabase tables and OOP.
• Does not get in the way of existing ArcObjects code.
• Works with Desktop ArcObjects, Addin, SOE and Engine applications.
• Does not require any auto-generated code. No XML mapping files. No dependency on the IDE.
• Supports CRUD operations with intuitive syntax.
• Supports runtime "code first" methods for creating feature classes and tables based on defined types.
• Respects all geodatabase behaviours such as versions, edit sessions, etc.
• Works with anything that implements IFeatureClass or ITable (i.e. shapefiles, coverages). Note: The GUI tool only works with SDE, file and personal geodatabases.
• Returns mapped objects as a lazy sequence implementing IEnumerable<T>. Allows for LINQ queries. Facilitates functional programming.
• Provides JSON serialization/deserialization for geometries.
• Provides KML serialization for geometries.
• Enables common spatial operations and predicates as extension methods for IGeometry to avoid verbose interface casting code.
• Mapped properties automatically raise the INotifyPropertyChanged.PropertyChanged event upon property setter access (via Reflection.Emit but memoized).
• Super light weight. The entire library is written in 600 lines of code.