Fix bug when closing the socket

[JoachimVeulemans]

A bug appears when closing the socket:
'Cannot access a disposed object. Object name: System.Net.Sockets.Socket.'

According to the documentation, a 'Shutdown' should always be called before closing the Socket:
https://learn.microsoft.com/en-us/dotnet/api/System.Net.Sockets.Socket.Close?view=netframework-4.8

Would it be possible to compile another version and update NuGet?

Many thanks!

[MarcusWichelmann]

Hi,

thanks for your pull request, but I don't plan to do any new releases of this library, as stated in the README.

I think it's better to let this library die. You would be better off with switching to another library or implementing the very little logic, that's needed for asynchronous TCP sockets, yourself. It will probably even turn out better than how this library implements things.

Same goes for https://github.com/MarcusWichelmann/LibMJPEGServer, which is probably the only reason anyone is still using this library. But that's also way outdated and very unoptimized.