o, thanks for your replying! but it seems do not work as expected! the port is still open,then i use System.Runtime.Remoting.Channels.ChannelServices.UnregisterChannel ,and it's ok! thanks a lot,my dear friend!

When the application is running,how can i update the componets (dlls)the app used? thanks a lot

How can make the tcpchannel stop listening the port without stop de application? Thanks a lot!