AutoMapper

Lucky Penny SoftwareCode Generation Tools.NET
Version v16.1.0 (Mar 3, 2026)

Flexible object mapping library for .NET applications and layered systems.

  • Automatically maps between object types using configurable conventions in .NET.
  • Supports DTO projection, custom logic, and structured mapping configuration profiles.
  • Integrates with dependency injection and queryable data transformation workflows.
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Automate mapping between complex data models and simplified data transfer objects.
AutoMapper is a .NET object mapping library that converts data between types using conventions and explicit configuration. It supports DTO transformations, projection scenarios, and structured mapping definitions, helping developers manage data flow across layers while keeping mapping logic maintainable and separated from core application code.

Convention-Based Mapping Engine

AutoMapper maps between source and destination types by matching members through naming conventions. This reduces the need for repetitive manual assignments and supports consistent transformations across application layers such as domain models, view models, and data transfer objects.

Fluent Mapping Configuration

The library provides a fluent API for defining mapping rules. Developers can configure mappings, override default behaviors, and specify member transformations in a readable and centralized way, ensuring mapping definitions remain clear and easy to maintain.

Profile-Driven Organization

Mappings can be grouped into profiles to organise configuration by feature or module. This approach supports modular design, simplifies registration, and helps manage mapping complexity in larger solutions with multiple bounded contexts.

DTO And Model Projection

AutoMapper supports projection of complex domain models into simplified data transfer objects. This is useful for APIs, messaging systems, and UI layers where tailored data shapes are required without exposing full internal structures.

Queryable Data Projection

The library enables projection directly from queryable data sources, allowing destination types to be constructed as part of query execution. This supports efficient data retrieval workflows where only required fields are selected and transformed.

Custom Value Resolvers

Developers can define custom resolvers and converters to control how specific members are mapped. This allows handling of calculated values, transformations, and specialised mapping scenarios without embedding logic into domain entities.

Conditional Mapping Rules

AutoMapper supports conditional logic to control when members are mapped. Developers can define rules that determine whether a value should be transferred, helping manage scenarios involving null handling, validation, or selective updates.

Dependency Injection Support

The library integrates with dependency injection frameworks commonly used in .NET applications. Mappings can be registered from assemblies and injected into services, enabling consistent configuration and reuse across the application lifecycle.

Dynamic And Flexible Mapping

AutoMapper can map between strongly typed objects and dynamic structures such as dictionaries. This supports scenarios where data formats are flexible or not known at compile time, while still aligning keys with destination properties.

Nested Object Graph Handling

The library handles nested and complex object graphs, including recursive relationships and depth control. Developers can configure how deeply mappings should traverse and how references are preserved during transformation processes.

Product Compatibility

Review the details below to ensure this product is supported within your environment.

Component Type

  • .NET

.NET Version

  • .NET 10 LTS
  • .NET 9 STS
  • .NET 8 LTS
  • .NET 4.8 or earlier

.NET Platform

  • .NET Assembly
  • .NET Class