---
layout: releasenotes
title: Release Notes Mono 2.0.1
version: 2.0.1
releasedate: '2008-10-22'
---

<table>
<col width="100%" />
<tbody>
<tr class="odd">
<td align="left"><h2>Table of contents</h2>
<ul>
<li><a href="#mono-201-release-notes">1 Mono 2.0.1 Release Notes</a></li>
<li><a href="#major-highlights">2 Major Highlights</a></li>
<li><a href="#changes-since-20">3 Changes Since 2.0</a>
<ul>
<li><a href="#gtk">3.1 GTK#</a></li>
<li><a href="#bug-fixes">3.2 Bug Fixes</a></li>
</ul></li>
<li><a href="#installing-mono-201">4 Installing Mono 2.0.1</a></li>
<li><a href="#contributors">5 Contributors</a></li>
</ul></td>
</tr>
</tbody>
</table>

## Mono 2.0.1 Release Notes

Mono 2.0.1 is a portable and open source implementation of the .NET framework for Unix, Windows, MacOS and other operating systems.

*Release Date: October 23rd, 2008*

## Major Highlights

Mono 2.0.1 is a bug fix release for 2.0.

## Changes Since 2.0

These are the major changes that happened since the 2.0 release of Mono.

All of the changes since 1.2 are documented in the following release notes:

[1.2.1](http://www.go-mono.com/archive/1.2.1), [1.2.2](http://www.go-mono.com/archive/1.2.2), [1.2.3](http://www.go-mono.com/archive/1.2.3), [1.2.4](http://www.go-mono.com/archive/1.2.4), [1.2.5](http://www.go-mono.com/archive/1.2.5), [1.2.6](http://www.go-mono.com/archive/1.2.6), [1.9](http://www.go-mono.com/archive/1.9), [1.9.1](http://www.go-mono.com/archive/1.9.1) and [2.0](/Release_Notes_Mono_2.0).

### GTK\#

GTK# was updated to 2.12.5 on the Mono VMware image, openSUSE 11.0 and Mac OS X.

Here's what's new:

-   [Bug 400595 - Crashes when the window delete event is added after the creation of the window](https://bugzilla.novell.com/show_bug.cgi?id=400595)
-   [Bug 426876 - Classes "\*Adapter" should throw ArgumentNullException for their (\*Implementor) constructor](https://bugzilla.novell.com/show_bug.cgi?id=426876)
-   Atk API cleanup
-   Win32 installer build integration

### Bug Fixes

Here are the bugs that were fixed for 2.0.1:

-   [Bug 426309 - Crash with microsoft-compiled binary](https://bugzilla.novell.com/show_bug.cgi?id=426309)
-   [Bug 431304 - reverse invoke via COM when marshaling a BSTR by ref retval fails to convert MonoString to native string.](https://bugzilla.novell.com/show_bug.cgi?id=431304)
-   [Bug 433908 - Problem with Npsql and pooling](https://bugzilla.novell.com/show_bug.cgi?id=433908)
-   [Bug 431811 - Process.HasExited does not work on Mono 2.0 runtime](https://bugzilla.novell.com/show_bug.cgi?id=431811)
-   [Bug 434620 - Structure Corruption](https://bugzilla.novell.com/show_bug.cgi?id=434620)
-   [Bug 428406 - InvalidCastException when casting multi-dimensional jagged arrays](https://bugzilla.novell.com/show_bug.cgi?id=428406)
-   [Bug 434544 - JIT / Runtime corruption](https://bugzilla.novell.com/show_bug.cgi?id=434544)
-   [Bug 432673 - Invalid IL code in ctor ()](https://bugzilla.novell.com/show_bug.cgi?id=432673)
-   [Bug 426264 - Function return inconsistent ulong value, which has dummy parameter of a Class and a ulong](https://bugzilla.novell.com/show_bug.cgi?id=426264)
-   [Bug 430963 - Optimization - Don't allocate 32kb buffer in CachedRawResponse that is never used](https://bugzilla.novell.com/show_bug.cgi?id=430963)
-   [Bug 430040 - TcpClient breaks after 1000 consecutive connections](https://bugzilla.novell.com/show_bug.cgi?id=430040)
-   [Bug 435549 - Memory leak with Response.Cache.SetCacheability(HttpCacheability.Public);](https://bugzilla.novell.com/show_bug.cgi?id=435549)
-   [Bug 432466 - NPIV screens in an NVP deployment cannot assume presence of ZOS](https://bugzilla.novell.com/show_bug.cgi?id=432466)
-   [Bug 433741 - PATCH for OdbcDataReader.GetBytes()](https://bugzilla.novell.com/show_bug.cgi?id=433741)
-   [Bug 416462 - Remoting takes an inordinate amount of time when passing 4KB or 8KB strings](https://bugzilla.novell.com/show_bug.cgi?id=416462)
-   [Bug 437691 - System.InvalidCastException: Cannot cast from source type to destination type. at System.Web.HttpApplicationFactory.AttachEvents (System.Web.HttpApplication app)](https://bugzilla.novell.com/show_bug.cgi?id=437691)
-   [Bug 437289 - with EnableSessionState="False" access to Context.ApplicationInstance.Session; should throw an exception](https://bugzilla.novell.com/show_bug.cgi?id=437289)

Other bug fixes without bug numbers:

-   Fixed a deadlock in the runtime assembly loading code.
-   Added a workaround against an amd64 shutdown crash.
-   Fixed an issue with finalizers not being called which was a regression from 1.9.x.
-   Added a workaround for parent processes which disable some real time signals needed by the runtime [\[1\]](http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=499569).

## Installing Mono 2.0.1

**Binary Packages and Source Code Downloads:**

    Source code and pre-compiled packages for Linux, Solaris,
    MacOS X and Windows is available from our web site from
    the Downloads section.

**Quick source code installation:**

    If we have no packages for your platform, installing from
    source code is very simple.

Compile libgdiplus to support System.Drawing:

``` bash
    $ tar xzf libgdiplus-2.0.tar.gz
    $ cd libgdiplus-2.0
    $ ./configure
    $ make
    $ make install
```

Then compile Mono itself:

``` bash
    $ tar xzf mono-2.0.1.tar.gz
    $ cd mono-2.0.1
    $ ./configure
    $ make
    $ make install
```

## Contributors

These are the git commiters to the Mono 2.0.1 release: