End Google Ads 201810 - BS.net 01 --> Hello,

i have a very strange problem, i have a multi-threaded udp-server and a client. Everytime i send a datagram to my server i get a SocketException "Connection was closed by remote host". CONNECTION? in UDP?

I've made my UDP-Server directly with Sockets and not with UdpClient. But the same error i got as i had my server with UdpClient. I really don't know what's wrong there...

Does somebody knows something about this Exception? Can somebody help me please?