"AutoMapper" like, Roslyn based, code fix provider that allows generating mapping code in design time. The main features are: generating the implementation of mapping methods and constructors, clone methods and lambda projections. There are also a few additional features like splatting or completing method invocation and object initialization with local variables. You can download it as Visual Studio Extension from Visual Studio Marketplace.

Programming language: C#
License: MIT License
Latest version: v1.20.463

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"AutoMapper" like, Roslyn based, code fix provider that allows to generate mapping code in design time.

You can download it as Visual Studio Extension from Visual Studio Marketplace.


The reasons behind why I don't use AutoMapper

Further Development

If you find this extension useful (you feel it helps you on the daily basis) you can support further development by buying me a coffee (it's simple, just click the button below). Sometimes it's hard to stay awake till midnight implementing new features, coffee helps me with that. . I really appreciate your support in any form.

support guide


Before you start any contributing work, please read the contribution guidline

Supported IDE


Install as VSIX from Market place or as a NuGet package. Verify your Roslyn integration option in case you are using R#.

JetBrains Rider

Install as a NuGet package


Install as a NuGet package or use this instruction to install from VSIX

Using along with Resharper

If you are not able to open Roslyn refactoring menu (ctr + .) please verify your Resharper settings related to Visual Studio Integration or Visual Studio code analysis (depends on the R# version). For more information please check #50

[resharper settings](doc/resharper_settings.jpg)

Main features

Generate mapping method body

Pure mapping method

Non-void method that takes single parameter

public UserDTO Map(UserEntity entity)


[Generating pure mapping method implementation](doc/pure_mapping_method_newone.gif)

Updating method

Void method that takes two parameters

public void Update(UserDTO source, UserEntity target)


[Generating update method implementation](doc/update_method.gif)

Mapping Constructor

Constructor method that takes single complex parameter

public UserDTO(UserEntity user)


[Generating mapping constructor implementation](doc/mapping_constructor.gif)

Constructor method that takes more than one parameter

public UserDTO(string firstName, string lastName, int age, int cash)

Generating multi-parameter constructor

Updating member method

Void member method that takes single parameter

public void UpdateWith(UserEntity en)


[Generating update member method imeplementation](doc/update_member_method.gif)

Void member method with more than one parameter

public void Update(string firstName, string lastName, int age)

Generate inline code for fixing Compiler Errors:

CS0029 Cannot implicitly convert type 'type' to 'type'


CS0266 Cannot implicitly convert type 'type1' to 'type2'. An explicit conversion exists (are you missing a cast?)


CS7036 There is no argument given that corresponds to the required formal parameter


Other mappings

  • Complete empty initialization block [Generate initialization bloc](doc/emptyInitialization.gif)

  • Complete empty initialization block in lambda expression Expression<Func<T,T2>> = (T) => new T2{} initialization block in lambda expression

  • Provide local accessible variables as parameters for method and constructor invocation [locals as parameters](doc/localsforconstructor.gif)

  • Create missing mapping lambda
    [mapping lambda](doc/mapping_lambda.gif)

  • Generate ICloneable interface implementation generate clone method

Object scaffolding

sample scaffolding

Mapping rules

  • Mapping Property-To-Property csharp target.FirstName = source.FirstName; target.LastName = source.LastName;
  • Mapping Method Call-To-Property csharp target.Total = source.GetTotal()
  • Flattening with sub-property csharp target.UnitId = source.Unit.Id
  • Mapping complex property csharp target.MainAddress = new AddressDTO(){ BuildingNo = source.MainAddress.BuildingNo, City = source.MainAddress.City, FlatNo = source.MainAddress.FlatNo, Street = source.MainAddress.Street, ZipCode = source.MainAddress.ZipCode };
  • Mapping collections csharp target.Addresses = source.Addresses.Select(sourceAddresse => new AddressDTO(){ BuildingNo = sourceAddresse.BuildingNo, City = sourceAddresse.City, FlatNo = sourceAddresse.FlatNo, Street = sourceAddresse.Street, ZipCode = sourceAddresse.ZipCode }).ToList().AsReadOnly();
  • Unwrapping wrappers csharp customerEntity.Kind = cutomerDTO.Kind.Selected;
    public enum CustomerKind

    public class Dropdown<T>
        public List<T> AllOptions { get; set; }

        public T Selected { get; set; }

    public class CustomerDTO
        public string Name { get; set; }
        public Dropdown<CustomerKind> Kind { get; set; }

    public class UserEntity
        public string Name { get; set; }
        public CustomerKind Kind { get; set; }
  • Using existing direct mapping constructor

    target.MainAddress = new AddressDTO(source.MainAddress);
  • using existing multi-parameter constuctor

    this.User =  new UserDTO(firstName: entity.FirstName, lastName: entity.LastName, age: entity.Age);