AutoMapper 16.0.0

AutoMapper

CI NuGet Documentation Status

What is AutoMapper?

AutoMapper is a simple little library built to solve a deceptively complex problem - getting rid of code that mapped one object to another. This type of code is rather dreary and boring to write, so why not invent a tool to do it for us?

This is the main repository for AutoMapper, but there's more:

How do I get started?

First, configure AutoMapper to know what types you want to map, in the startup of your application:

var configuration = new MapperConfiguration(cfg => 
{
    cfg.CreateMap<Foo, FooDto>();
    cfg.CreateMap<Bar, BarDto>();
}, loggerFactory);

// or more typically, using IServiceCollection
services.AddAutoMapper(cfg => 
{
    cfg.CreateMap<Foo, FooDto>();
    cfg.CreateMap<Bar, BarDto>();
});

// only during development, validate your mappings; remove it before release
#if DEBUG
configuration.AssertConfigurationIsValid();
#endif
// use DI (http://docs.automapper.io/en/latest/Dependency-injection.html) or create the mapper yourself
var mapper = configuration.CreateMapper();

Then in your application code, execute the mappings:

var fooDto = mapper.Map<FooDto>(foo);
var barDto = mapper.Map<BarDto>(bar);

Check out the getting started guide. When you're done there, the wiki goes in to the nitty-gritty details. If you have questions, you can post them to Stack Overflow.

Where can I get it?

First, install NuGet. Then, install AutoMapper from the package manager console:

PM> Install-Package AutoMapper

Or from the .NET CLI as:

dotnet add package AutoMapper

Do you have an issue?

You might want to know exactly what your mapping does at runtime.

If you're still running into problems, file an issue above.

If you are a paying customer, you can contact support via your account.

How do I set the license key?

You can set the license key when registering AutoMapper:

services.AddAutoMapper(cfg => 
{
    cfg.LicenseKey = "<license key here>";
})

You can register for your license key at AutoMapper.io

Showing the top 20 packages that depend on AutoMapper.

Packages Downloads
AutoMapper.Collection
Collection Add/Remove/Update support for AutoMapper. AutoMapper.Collection adds EqualityComparison Expressions for TypeMaps to determine if Source and Destination type are equivalent to each other when mapping collections.
 58
Nuke.Common
Cross-platform build automation system
 56
AutoMapper.Collection
Collection Add/Remove/Update support for AutoMapper. AutoMapper.Collection adds EqualityComparison Expressions for TypeMaps to determine if Source and Destination type are equivalent to each other when mapping collections.
 54
AutoMapper.Collection
Collection Add/Remove/Update support for AutoMapper. AutoMapper.Collection adds EqualityComparison Expressions for TypeMaps to determine if Source and Destination type are equivalent to each other when mapping collections.
 53
Nuke.Common
Cross-platform build automation system
 53
AutoMapper.Collection
Collection Add/Remove/Update support for AutoMapper. AutoMapper.Collection adds EqualityComparison Expressions for TypeMaps to determine if Source and Destination type are equivalent to each other when mapping collections.
 52
KubernetesClient
Client library for the Kubernetes open source container orchestrator.
 52
AutoMapper.Collection
Collection updating support for AutoMapper
 50
KubernetesClient
Client library for the Kubernetes open source container orchestrator.
 50
Nuke.Common
Cross-platform build automation system
 50
AutoMapper.Collection
Collection updating support for AutoMapper
 49
KubernetesClient
Client library for the Kubernetes open source container orchestrator.
 49
Nuke.Common
Cross-platform build automation system
 49
KubernetesClient
Client library for the Kubernetes open source container orchestrator.
 48

.NET Framework 4.7.1

.NET Standard 2.0

.NET 10.0

.NET 9.0

.NET 8.0

Version Downloads Last updated
16.0.0 5 12/5/2025
16.0.0-beta-1 6 11/22/2025
15.1.0 14 10/27/2025
15.0.1 18 7/12/2025
15.0.0 24 7/3/2025
14.0.0 41 2/20/2025
13.0.1 63 2/12/2024
13.0.0 54 2/6/2024
12.0.1 68 7/2/2023
12.0.0 55 7/2/2023
11.0.1 51 7/2/2023
11.0.0 57 7/2/2023
10.1.1 57 4/12/2022
10.0.0 63 7/2/2023
9.0.0 49 7/2/2023
8.1.1 52 7/2/2023
8.1.0 52 7/2/2023
8.0.0 50 7/2/2023
7.0.1 59 7/2/2023
7.0.0-alpha-0001 47 7/2/2023
6.2.2 70 7/2/2023
6.2.1 57 7/2/2023
6.2.0 49 7/2/2023
6.1.1 49 7/2/2023
6.1.0 68 7/2/2023
6.0.2 48 7/2/2023
5.2.0 56 7/2/2023
5.1.1 50 7/2/2023
5.0.2 43 7/2/2023
5.0.0-beta-1 51 7/2/2023
4.2.1 48 7/2/2023
4.2.0 57 7/2/2023
4.1.1 66 7/2/2023
4.0.4 48 7/2/2023
4.0.0-alpha1 51 7/2/2023
3.3.1 56 7/2/2023
3.3.0 47 7/2/2023
3.2.1 55 7/2/2023
3.1.1 46 7/2/2023
3.1.0 53 7/2/2023
3.0.0 43 7/2/2023
2.2.1 55 7/2/2023
2.2.0 46 7/2/2023
2.1.267 52 7/2/2023
2.1.266 46 7/2/2023
2.1.265 47 7/2/2023
2.1.262 48 7/2/2023
2.1.1 48 7/2/2023
2.0.0 52 7/2/2023
1.1.2 47 7/2/2023
1.1.0.118 47 7/2/2023