---
layout: releasenotes
title: Mono 4.2.3 Release Notes
version: 4.2.3
releasedate: '2016-03-07'
---

Mono 4.2.3 is a service release for the Mono 4.2 series.

### Highlights

This is a small maintenance release with reliability and behavior improvements.

## Class Libraries

-   [#36116](https://bugzilla.xamarin.com/show_bug.cgi?id=36116) - \[System.Web.Services\] Unix paths fix

## Runtime

-   [#37079](https://bugzilla.xamarin.com/show_bug.cgi?id=37079) - \[jit\] Fix the support for gshared types in mini_emit_initobj ()
-   [#37273](https://bugzilla.xamarin.com/show_bug.cgi?id=37273) - \[llvm\] Disable support for nested clauses.

## Garbage Collector

-   [#38012](https://bugzilla.xamarin.com/show_bug.cgi?id=38012) - \[sgen\] Fix register scanning on ARM

## Performance

-   [#37846](https://bugzilla.xamarin.com/show_bug.cgi?id=37846) - \[jit\] Fix the reference type detection for Volatile:Read/Write ()