aggregate - match > sort > group > replacewith

Program.cs

using MongoDB.Driver;
using MongoDB.Entities;
using MongoDB.Entities.Core;
using System;
using System.Linq;

namespace StackOverFlow
{
    public class Product : Entity
    {
        public int NonUniqueId { get; set; }
        public string Name { get; set; }
        public decimal Price { get; set; }
    }

    public static class Program
    {
        private static void Main()
        {
            new DB("test", "localhost");

            var pipeline = new Template<Product>(@"
            [
                {
                  $match: { <Name>: '<product_name>' }
                },
                {
                  $sort: { <Price>: 1 }
                },
                {
                  $group: {
                    _id: '$NonUniqueId',
                    product: { $first: '$$ROOT' }
                  }
                },
                {
                  $replaceWith: '$product'
                },
                {
                  $limit: <limit_value>
                }
            ]")

            .Path(p => p.Name)
            .Tag("product_name", "book")
            .Path(p => p.Price)
            .Tag("limit_value", "10");

            var products = DB.Aggregate(pipeline).ToList();

            foreach (var p in products)
            {
                Console.WriteLine($"product: {p.Name} | price: {p.Price}");
            }

            Console.ReadLine();
        }
    }
}