geo search test

Program.cs

using MongoDB.Entities;
using System;
using System.Threading.Tasks;

namespace TestProg
{
    internal static class Program
    {
        public class ArtGallery : Entity
        {
            public string Name { get; set; }
            public Coordinates2D Location { get; set; }
        }

        private static async Task Main()
        {
            await DB.InitAsync("test");

            await new[]
            {
                new ArtGallery {
                    Name = "Galleria Le-Pari",
                    Location = new Coordinates2D(48.8539241, 2.2913515)
                },
                new ArtGallery {
                    Name = "Versailles House Of Art",
                    Location = new Coordinates2D(48.796964, 2.137456)
                },
                new ArtGallery {
                    Name = "Poissy Arts & Crafts",
                    Location = new Coordinates2D(48.928860, 2.046889)
                }
            }.SaveAsync();

            await DB.Index<ArtGallery>()
                    .Key(g => g.Location, KeyType.Geo2DSphere)
                    .Option(o => o.Background = false)
                    .CreateAsync();

            var locEiffelTower = new Coordinates2D(48.857908, 2.295243);

            var results = await DB.Find<ArtGallery>()
                                  .Match(g => g.Location, locEiffelTower, 20000)
                                  .ExecuteAsync();

            foreach (var gallery in results)
            {
                Console.WriteLine(gallery.Name);
            }

            Console.Read();
        }
    }
}