C#

using (var system = ActorSystem.Create("example123", config))
{
                MongoDbPersistence.Instance.Apply(system);


                var pActor = system.ActorOf(Props.Create<SectionActor>(), "section-actor");
                pActor.Tell(new CheckSeatMessage("1", "1", new List<string> {"A", "B"}));
                Console.ReadLine();
}

    public class SectionActor : PersistentActor
    {
        public SectionActor()
        {
            
        }

        protected override bool ReceiveRecover(object message)
        {
            //throw new NotImplementedException();
            if (message is SnapshotOffer)
            {
                var snap = ((SnapshotOffer) message).Snapshot;
            }

            return true;
        }

        protected override bool ReceiveCommand(object message)
        {
            try
            {
                PatternMatch.Match(message)
               .With<CheckSeatMessage>(CheckIfSeatsAvailable);
            }
            catch (Exception ex)
            {
                
                
            }
           

            return true;
        }

        private void CheckIfSeatsAvailable(CheckSeatMessage message)
        {
            Console.WriteLine("Checking for seats.");
            Persist(message, PersistCheckSeatsMessage);
        }

        private void PersistCheckSeatsMessage(CheckSeatMessage obj)
        {
            Console.WriteLine("Persisted");
        }
        
        public override string PersistenceId => "SectionActor";

    }
    
    
    public class CheckSeatMessage
    {

        public List<string> SeatKeys { get; set; }

        public string RowKey { get; set; }

        public string SectionKey { get; set; }
        
        public CheckSeatMessage(string sectionKey, string rowKey, List<string> seatKeys)
        {
            SeatKeys = seatKeys;
            RowKey = rowKey;
            SectionKey = sectionKey;
        }

    }