using System;

using Riok.Mapperly.Abstractions;

​

public class User(string emailAddress) 

{

    public string EmailAddress { get; private set; } = emailAddress;

}

​

public record UserUpdateDto(string EmailAddress);

​

[Mapper(IncludedMembers = MemberVisibility.All)]

public static partial class UserMapper 

{

    static partial void ApplyTo(this UserUpdateDto input, User user);

    public static void ApplyUpdates(this UserUpdateDto input, User user) 

    {

        UserMapper.ApplyTo(input, user);

    }

}

public class Program

{

    public static void Main()

    {

        var user = new User("user@gmail.com");

        var updates = new UserUpdateDto("new-user@gmail.com");

        updates.ApplyUpdates(user);

        Console.WriteLine(user.EmailAddress);

    }

}