asp.net core integration in core cannot close and free up port footprint

asp.net core integration in core cannot close and free up port footprint and exit application，
Call edited by
`
lifetime.ApplicationStopping.Register(() =>
{
DI.GetService().Stop();
});
`

`
public void Init(Func handler)
{

if (_options.Value.EventLoopCount > 0)
{
bossGroup = new MultithreadEventLoopGroup(_options.Value.EventLoopCount);
}
else
{
bossGroup = new MultithreadEventLoopGroup();
}

workerGroup = new MultithreadEventLoopGroup();
bootstrap = new ServerBootstrap();
bootstrap.Group(bossGroup, workerGroup);
bootstrap.Channel();
//bootstrap.Option(ChannelOption.SoBacklog, _options.SoBacklog);
bootstrap.ChildOption(ChannelOption.RcvbufAllocator, new AdaptiveRecvByteBufAllocator(64, _options.Value.MaxPackLength, 65536));
bootstrap.Option(ChannelOption.TcpNodelay, true);
bootstrap.ChildOption(ChannelOption.SoKeepalive, true);
bootstrap.ChildHandler(new ActionChannelInitializer(channel =>
{
IChannelPipeline pipeline = channel.Pipeline;
// 添加日志拦截器

pipeline.AddLast(new LoggingHandler("SRV-CONN"));
pipeline.AddLast(new FrameDecoder(ByteOrder.LittleEndian, _options.Value.MaxPackLength, _options.Value.HeadPosition, _options.Value.HeadLength
, _options.Value.LengthAdjustment, _options.Value.InitialBytesToStrip, true));
//pipeline.AddLast(new LengthFieldBasedFrameDecoder(ByteOrder.LittleEndian, _options.Value.MaxPackLength, _options.Value.HeadPosition, _options.Value.HeadLength
// , _options.Value.LengthAdjustment, 0, true));
//pipeline.AddLast("MTPackageDecode", new MTDecoder());
if (_options.Value.Timeout > 0)
{
pipeline.AddLast("ReadTimeout", new ReadTimeoutHandler(_options.Value.Timeout));
}
pipeline.AddLast(handler());
}));
}
public async Task Start()
{
bootstrapChannel =await bootstrap.BindAsync(_options.Value.DevicePort);
}
public void Stop()
{
bootstrapChannel.CloseAsync().Wait(3000);
bossGroup.ShutdownGracefullyAsync().Wait(3000);
workerGroup.ShutdownGracefullyAsync().Wait(3000);
}
`