[FluentBuilder.AutoGenerateBuilder]
public class UserDto
{
    public string FirstName { get; set; }

    public string LastName { get; set; }

    public DateTime? Date { get; set; }
}

using System;

namespace FluentBuilderConsumer
{
    class Program
    {
        static void Main(string[] args)
        {
            var user = new FluentBuilder.UserDtoBuilder()
                .WithFirstName("Test")
                .WithLastName("User")
                .Build();

            Console.WriteLine($"{user.FirstName} {user.LastName}");
        }
    }
}