MongoDB C# Driver reconnection issue

MongoClientReconnectIssue.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Driver;

namespace MongoClientReconnectIssue
{
    class Program
    {
        static void Main(string[] args)
        {
            var hosts = new[]
            {
                "abc-mdb-node1.network.com", // Start with: Primary
                "abc-mdb-node2.network.com", // Start with: Secondary
                "abc-mdb-node3.network.com"  // Start with: Secondary
            };

            var db = GetDb(hosts);

            var source = new CancellationTokenSource();
            var token = source.Token;

            Task.Run(async () =>
            {
                while (!token.IsCancellationRequested)
                {
                    string message = null;
                    try
                    {
                        dynamic result = await db.RunCommandAsync((Command<BsonDocument>)"{ replSetGetStatus: 1 }", cancellationToken: token);
                        IEnumerable<dynamic> values = result["members"];
                        message = string.Join(Environment.NewLine, values.Select(member =>
                        {
                            string nodeInfo;
                            try
                            {
                                nodeInfo = $"Ping: {member["pingMs"]}";
                            }
                            catch (KeyNotFoundException)
                            {
                                nodeInfo = $"Self: {member["self"]}";
                            }
                            return $"{member["name"]}:{member["stateStr"]}, {nodeInfo}";

                        }));

                    }
                    catch (Exception ex)
                    {
                        message = ex.Message;
                        db = GetDb(hosts);
                    }
                    finally
                    {
                        Console.Clear();
                        Console.WriteLine(message);
                        await Task.Delay(500, token);
                    }
                }
            }, token);

            Console.ReadKey();
            source.Cancel();
        }

        private static IMongoDatabase GetDb(string[] host)
        {
            var servers = host.Select(h => new MongoServerAddress(h)).ToList();
            var client = new MongoClient(new MongoClientSettings
            {
               WriteConcern = WriteConcern.WMajority,
               Servers = servers
            });

            return client.GetDatabase("admin");
        }
    }
}