What classes can/cannot be used in xamarin?

Question

Android

I write for android.
We need an exchange of broadcast messages, I use classes from System.Net; System.Net.Sockets.
For some reason, only sending works, not receiving, I saw that there is a Java.Net library in which there are similar classes, is there any difference what to use?
Assumed that all .Net classes can be used in Xamarin

Answer 1

Not all, it is worth paying attention to the following points:
- Xamarin is built on Mono;
- PCL for general application logic imposes its own limitations.
It does not make sense to list all the classes, everything will come up as the task is solved.