Guidelines for socket programming on IL2CPP environment

For avoiding conflicts with IL2CPP(not Mono), is there any guidelines or best practice regarding to socket programming under IL2CPP environment? For example, (disclaimer: these bullet list is just my rough guess, and it may be incorrect!) * Do not use BeginXXX (e.g. BeginSend) * Use worker thread and blocking socket function calls * Use only main thread and use XXXAsync(e.g. SendAsync) * Do not use await and async keyword