ConcurrentDictionary 用法

using Iot.Model.SklDtos;
using WindowsTcpip.Server;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Iot.Dal.Base;
using Iot.Common;
using Iot.Model;
using Newtonsoft.Json;
using Iot.Factory;
using Aliyun.MNS.Model;
using Aliyun.MNS;
using System.Threading;
using Iot.Model.BatteryTcpip;
using Iot.Model.Pagination;
using Iot.Dal.WA_Device;

namespace SktServer
{
    class Program
    {
        public static ConcurrentDictionary<int, BatteryOtaModel> OtaList = new ConcurrentDictionary<int, BatteryOtaModel>();
        static void Main(string[] args)
        {
            var otaef = OtaList.Where(A => A.Key == 1).FirstOrDefault();
            if (otaef.Value != null && !string.IsNullOrEmpty(otaef.Value.BatterySn))
            {
               
            }
            else
            {
                OtaList.TryAdd(1, new BatteryOtaModel() { BatterySn = "123", OtaNumber = 1 });
              
            }
            otaef = OtaList.Where(A => A.Key == 1).FirstOrDefault();
            if (otaef.Value != null && !string.IsNullOrEmpty(otaef.Value.BatterySn))
            {
                otaef.Value.BatterySn = "333";
                otaef.Value.OtaNumber = 2;
            }
            if (otaef.Value != null && !string.IsNullOrEmpty(otaef.Value.BatterySn))
            {
                otaef.Value.BatterySn = "444";
                otaef.Value.OtaNumber = 3;
            }
            var ef = OtaList.Where(A => A.Key == 1).FirstOrDefault();
            BatteryOtaModel mol = new BatteryOtaModel();
            OtaList.TryRemove(1, out mol);
            
            Console.Read();
        }

        public class BatteryOtaModel
        {
            public string BatterySn { get; set; }
            public long OtaNumber { get; set; }
        }
    }
}