No protected fields, but there is a private fields in autocomplete.

private-completion

Xamarin Studio
Version 5.5.4 (build 15)
Installation UUID: 806cbf76-e175-48d5-a902-167bd48d2900
Runtime:
    Microsoft .NET 4.0.30319.18444
    GTK+ 2.24.22 (MS-Windows theme)
    GTK# 2.12.26

Build Information
Release ID: 505040015
Git revision: f93940a35458a18052f1a25e106e62ca970d9c40
Build date: 2014-11-19 13:26:21-05
Xamarin addins: dc23cbd91a3a0e1d326328e1229e86c942a49ec8

Operating System
Windows 6.1.7601.65536 (64-bit)

aBothe / Mono-D

No protected fields, but there is a private fields in autocomplete. #575