---
layout: releasenotes
title: Release Notes Mono 2.4.2
version: 2.4.2
releasedate: '2009-06-25'
---
Mono 2.4.2 is a portable and open source implementation of the .NET framework for Unix, Windows, MacOS and other operating systems.
## Major Highlights
Mono 2.4.2 is a bugfix release for Mono 2.4, which is the foundation for Novell's own long-term support Mono-based product.
In addition to bug fixes, this release includes the following major changes from 2.4.0:
- We now ship Microsoft's [ASP.NET MVC](http://www.asp.net/mvc) stack and ASP.NET MVC applications can run with Mono.
- xbuild has been updated
- Removed non-free amqp0-8.xml documentation.
## Changes in Mono 2.4
XSP now has Silverlight mime types registered.
Updated the browser database.
The C# Shell (csharp) will now accept C# scripts specified on the command line, like:
``` bash
csharp demo.cs
```
A major bug was fixed for multi-threaded applications using XPath, if you are using XPath in a multithreaded application, we strongly recommend that you upgrade to this version.
## Bugs fixed since Mono 2.4
Between Mono 2.4 and Mono 2.4.2, more than 140 bugs were fixed, this is a partial list (since not all bugs had tracking numbers):
- [315816](https://bugzilla.novell.com/show_bug.cgi?id=315816) - \[Regression\] One bad DLL leads to a failure of a complete website
- [325464](https://bugzilla.novell.com/show_bug.cgi?id=325464) - xsd is unable to generate correct classes from certain input files
- [328036](https://bugzilla.novell.com/show_bug.cgi?id=328036) - \[PATCH\]Casting bug with generic collections
- [342073](https://bugzilla.novell.com/show_bug.cgi?id=342073) - WebServices default WebForm does not work
- [345448](https://bugzilla.novell.com/show_bug.cgi?id=345448) - Default binding name is wrong, when declared in WebServiceBindingAttribute, but not used.
- [349688](https://bugzilla.novell.com/show_bug.cgi?id=349688) - SocketFlags.Partial is not implemented correctly in Linux
- [382589](https://bugzilla.novell.com/show_bug.cgi?id=382589) - Passing either Decimal.Max or Decimal.Min to a SQL Server 2005 stored procedure that takes a decimal(29,0) results in a SqlException
- [382589](https://bugzilla.novell.com/show_bug.cgi?id=382589) - Passing either Decimal.Max or Decimal.Min to a SQL Server 2005 stored procedure that takes a decimal(29,0) results in a SqlException
- [409583](https://bugzilla.novell.com/show_bug.cgi?id=409583) - ToString of methods with pointers in their signature is wrong
- [417398](https://bugzilla.novell.com/show_bug.cgi?id=417398) - \[PATCH\] System.Data.DataRowComparer.Default doesn't compare by row contents
- [421827](https://bugzilla.novell.com/show_bug.cgi?id=421827) - \[PATCH\] CookieContainer.GetCookie skips cookie when domain has no leading dot
- [424908](https://bugzilla.novell.com/show_bug.cgi?id=424908) - Oracle - stored procedure returning string throws exception - Size must be set
- [431039](https://bugzilla.novell.com/show_bug.cgi?id=431039) - First Run of IsolatedStorageFile is not threadsafe
- [436592](https://bugzilla.novell.com/show_bug.cgi?id=436592) - Error in the CustomizableFileSettingsProvider.Reset method
- [449092](https://bugzilla.novell.com/show_bug.cgi?id=449092) - \[Regression\] Sockets Novell c# LDAP api, LdapConnection.Disconnect() throws "The socket is not connected" exception
- [449683](https://bugzilla.novell.com/show_bug.cgi?id=449683) - MD throws NotImplementedException when parsing DLR project
- [458916](https://bugzilla.novell.com/show_bug.cgi?id=458916) - Implemetation errors on Copy.cs
- [459790](https://bugzilla.novell.com/show_bug.cgi?id=459790) - SoapRpcMethod based webservices return HTTP 500 error with Mono 2.0.1 Runtime
- [462947](https://bugzilla.novell.com/show_bug.cgi?id=462947) - TDS: not enough state reset when executing a query/stored procedure
- [463011](https://bugzilla.novell.com/show_bug.cgi?id=463011) - \[Regression\] Pooled connection is no longer reset
- [465613](https://bugzilla.novell.com/show_bug.cgi?id=465613) - HttpWebRequest.BeginGetRequestStream throws ProtocolViolationException
- [466031](https://bugzilla.novell.com/show_bug.cgi?id=466031) - Socket.EndReceive buglet
- [468570](https://bugzilla.novell.com/show_bug.cgi?id=468570) - Arithmatic overflow in System.Diagnostics.Stopwatch causes Elapsed property to return a negative timespan after the 25'th hour of running
- [469135](https://bugzilla.novell.com/show_bug.cgi?id=469135) - Issues with glue-less gtk-sharp running MonoDevelop
- [470336](https://bugzilla.novell.com/show_bug.cgi?id=470336) - crash while compiling on SLE_10/ppc
- [470336](https://bugzilla.novell.com/show_bug.cgi?id=470336) - crash while compiling on SLE_10/ppc
- [471305](https://bugzilla.novell.com/show_bug.cgi?id=471305) - Control lifecycle inconsistency between Mono and MS.NET implementations
- [471747](https://bugzilla.novell.com/show_bug.cgi?id=471747) - \[FreeBSD x86\] Failure of pinvoke2 test
- [471751](https://bugzilla.novell.com/show_bug.cgi?id=471751) - \[FreeBSD x86\] Failure of winx64structs test
- [475438](https://bugzilla.novell.com/show_bug.cgi?id=475438) - xbuild dies badly if gmcs not installed
- [476138](https://bugzilla.novell.com/show_bug.cgi?id=476138) - Win32 Socket behaviour changed.
- [476289](https://bugzilla.novell.com/show_bug.cgi?id=476289) - mod_mono report "(13)Permission denied: Failed to attach to existing dashboard"
- [477383](https://bugzilla.novell.com/show_bug.cgi?id=477383) - MaskedTextBox: Backspace doesn't work
- [477388](https://bugzilla.novell.com/show_bug.cgi?id=477388) - MaskedTextBox: Delete key deletes masked fields
- [477395](https://bugzilla.novell.com/show_bug.cgi?id=477395) - MaskedTextBox: Able to overwrite characters with L mask
- [477408](https://bugzilla.novell.com/show_bug.cgi?id=477408) - MaskedTextBox: Doesn't handle invalid input correctly
- [480377](https://bugzilla.novell.com/show_bug.cgi?id=480377) - System.Data.OracleClient : DataReader does not support System.TimeSpan
- [480856](https://bugzilla.novell.com/show_bug.cgi?id=480856) - xbuild don't recognize Multiple DEFINE
- [481336](https://bugzilla.novell.com/show_bug.cgi?id=481336) - xbuild don't compile IronPython.sln
- [481622](https://bugzilla.novell.com/show_bug.cgi?id=481622) - Exception when using layout template
- [481687](https://bugzilla.novell.com/show_bug.cgi?id=481687) - System.Convert.ChangeType(someIConvertibleObject, typeof(Image) Throws exception on mono. .Net difference
- [483268](https://bugzilla.novell.com/show_bug.cgi?id=483268) - Precompiled application can only be solved from original virtual path
- [483852](https://bugzilla.novell.com/show_bug.cgi?id=483852) - TypeBuilder should be resolved when used in a generic type instance
- [484244](https://bugzilla.novell.com/show_bug.cgi?id=484244) - \[Regression\] nunit-console.exe requires /noshadow
- [484294](https://bugzilla.novell.com/show_bug.cgi?id=484294) - Type.GetMethod does not find methods with nullable parameters when expected
- [484294](https://bugzilla.novell.com/show_bug.cgi?id=484294) - Type.GetMethod does not find methods with nullable parameters when expected
- [484384](https://bugzilla.novell.com/show_bug.cgi?id=484384) - Duplicate key in assembly resolving
- [484649](https://bugzilla.novell.com/show_bug.cgi?id=484649) - Mono.XBuild.CommandLine.LoggerInfo argument parsing is broken
- [484773](https://bugzilla.novell.com/show_bug.cgi?id=484773) - WorkingDictionary outside of the project file breaks the build
- [484795](https://bugzilla.novell.com/show_bug.cgi?id=484795) - \[PATCH\]WebClient.UploadValues using UTF-8 encoding and "POST" method do not upload accented characters properly
- [485377](https://bugzilla.novell.com/show_bug.cgi?id=485377) - Regression in Convert.ChangeType()
- [485377](https://bugzilla.novell.com/show_bug.cgi?id=485377) - Regression in Convert.ChangeType()
- [485435](https://bugzilla.novell.com/show_bug.cgi?id=485435) - JSON proxy class generator errors out when any webmethod signature takes a GUID parameter
- [485458](https://bugzilla.novell.com/show_bug.cgi?id=485458) - CustomValidator incorrectly requires ControlToValidate to be set for client side scripting to work.
- [485557](https://bugzilla.novell.com/show_bug.cgi?id=485557) - Response.ClearHeaders reset HttpCacheability to private
- [486234](https://bugzilla.novell.com/show_bug.cgi?id=486234) - System.String.LastIndexOf(string, StringComparison) crashes when using StringComparison.Ordinal on empty strings
- [486303](https://bugzilla.novell.com/show_bug.cgi?id=486303) - Type.IsGenericTypeDefinition crashes for user defined Type
- [486703](https://bugzilla.novell.com/show_bug.cgi?id=486703) - FtpWebRequest Send PrintWorkingDirectory Command Failed!
- [486904](https://bugzilla.novell.com/show_bug.cgi?id=486904) - System.Net.NetworkInformation.Ping throws InvalidOperationException "Process has not been started" on OSX
- [487155](https://bugzilla.novell.com/show_bug.cgi?id=487155) - ILASM does not work with octal values in QSTRINGS
- [487518](https://bugzilla.novell.com/show_bug.cgi?id=487518) - SIGSEGV in mono_arch_emit_call on amd64; running F# nunit unit tests
- [487625](https://bugzilla.novell.com/show_bug.cgi?id=487625) - ExtensionMethodAttribute and CS1685
- [487659](https://bugzilla.novell.com/show_bug.cgi?id=487659) - VUL-0: Mono sanbox breakout in IsolatedStorage {}
- [487758](https://bugzilla.novell.com/show_bug.cgi?id=487758) - Marshaling a native function pointer to native function call throws assertion
- [488630](https://bugzilla.novell.com/show_bug.cgi?id=488630) - mod-mono-server is broken using HTTPS
- [488670](https://bugzilla.novell.com/show_bug.cgi?id=488670) - Marshal.GetFunctionPtrFromDelegate crashes the runtime if the delegate signature includes an object type.
- [488960](https://bugzilla.novell.com/show_bug.cgi?id=488960) - Invalid CS0663 error with generics ('overloaded function cannot differ on use of parameter modifiers only')
- [489019](https://bugzilla.novell.com/show_bug.cgi?id=489019) - mono throwing exception while closing file descriptor 0
- [489687](https://bugzilla.novell.com/show_bug.cgi?id=489687) - Code render tag not working
- [490497](https://bugzilla.novell.com/show_bug.cgi?id=490497) - "watch for changes to web.config also in the subdirectories" causes problems
- [490753](https://bugzilla.novell.com/show_bug.cgi?id=490753) - HtmlInputFile doesn't work on pages with EnableViewState=false
- [491508](https://bugzilla.novell.com/show_bug.cgi?id=491508) - SessionSQLServerHandler : InitializeConnection -> NullReferenceException
- [491531](https://bugzilla.novell.com/show_bug.cgi?id=491531) - Settings in Web.config not being read
- [491590](https://bugzilla.novell.com/show_bug.cgi?id=491590) - The FTPWebRequest class doesn't properly resume file downloads
- [491828](https://bugzilla.novell.com/show_bug.cgi?id=491828) - xbuild hides important error information
- [492252](https://bugzilla.novell.com/show_bug.cgi?id=492252) - error runing an ASP.net page with validators
- [492329](https://bugzilla.novell.com/show_bug.cgi?id=492329) - gmcs generated invalid IL code for storing a new object in a generic out/ref parameters (regression from 2.2).
- [492666](https://bugzilla.novell.com/show_bug.cgi?id=492666) - NullReferenceException when binding a list to the ListView
- [493263](https://bugzilla.novell.com/show_bug.cgi?id=493263) - Using custom resource provider crashes application
- [493639](https://bugzilla.novell.com/show_bug.cgi?id=493639) - Invalid "Bind invocation wasn't formatted properly" in TemplateControlCompiler
- [493873](https://bugzilla.novell.com/show_bug.cgi?id=493873) - Multiple assemblies with same type name in precompiled updatable site
- [493874](https://bugzilla.novell.com/show_bug.cgi?id=493874) - Missing column in BlogEngine.NET
- [493887](https://bugzilla.novell.com/show_bug.cgi?id=493887) - Switch selects wrong branch when default is not last case
- [494221](https://bugzilla.novell.com/show_bug.cgi?id=494221) - IL Compiles but generates wrong code
- [494245](https://bugzilla.novell.com/show_bug.cgi?id=494245) - ASP.NET Pages not accepting base class with generic type
- [494567](https://bugzilla.novell.com/show_bug.cgi?id=494567) - r131501 breaks compilation of System.Windows.Forms_test_net_1\_1.dll
- [495011](https://bugzilla.novell.com/show_bug.cgi?id=495011) - Application restarts when touching a folder
- [495112](https://bugzilla.novell.com/show_bug.cgi?id=495112) - Can't compile cyclic structs with mono-2.4
- [496758](https://bugzilla.novell.com/show_bug.cgi?id=496758) - Xsp2 hides internal errors making it difficult to debug tricky web service issues
- [496905](https://bugzilla.novell.com/show_bug.cgi?id=496905) - Using Peek() after a short Read() returns -1 instead of trying to read more.
- [496951](https://bugzilla.novell.com/show_bug.cgi?id=496951) - The 'NoStore' attribute is not supported by the 'Outputcache' directive.
- [497174](https://bugzilla.novell.com/show_bug.cgi?id=497174) - ASP.NET 1.1 is broken with the recent changes made to templateParser.cs
- [497220](https://bugzilla.novell.com/show_bug.cgi?id=497220) - assertion in mono_local_regalloc when a local not initialized is used
- [497715](https://bugzilla.novell.com/show_bug.cgi?id=497715) - SqlParameter not handling SqlDbType.Xml / DbType.Xml ("No mapping exists ...")
- [497720](https://bugzilla.novell.com/show_bug.cgi?id=497720) - System.Collections.Generic.KeyCollection.CopyTo(TKey \[\] array, int arrayIndex) behaves different on Mono / .NET
- [497775](https://bugzilla.novell.com/show_bug.cgi?id=497775) - ASP.NET MVC's Html.TextBox()/etc. do nothing.
- [497839](https://bugzilla.novell.com/show_bug.cgi?id=497839) - xbuild don't recognize $(SolutionDir)
- [498118](https://bugzilla.novell.com/show_bug.cgi?id=498118) - Revision 131768 breaks UserControls added in web.config
- [498154](https://bugzilla.novell.com/show_bug.cgi?id=498154) - Xbuild does not recognize \*\*-Wildcard
- [498637](https://bugzilla.novell.com/show_bug.cgi?id=498637) - HTML link tag in ASP.NET MVC render bug
- [498692](https://bugzilla.novell.com/show_bug.cgi?id=498692) - many problems cross-building with gcc 4.2.x mingw cross
- [498853](https://bugzilla.novell.com/show_bug.cgi?id=498853) - Cannot configure ConsoleTraceListener to use standard error through configuration
- [499013](https://bugzilla.novell.com/show_bug.cgi?id=499013) - Appdomain.GetAssemblies() returns assemblies loaded for reflection only, not just for execution. Different behaviour than .NET
- [499851](https://bugzilla.novell.com/show_bug.cgi?id=499851) - Need notification for UIA when a PopupButton gains focus
- [499864](https://bugzilla.novell.com/show_bug.cgi?id=499864) - Dispose-Method of Mono.Data.SqliteClient.SqliteConnection doesn't close the connection.
- [499887](https://bugzilla.novell.com/show_bug.cgi?id=499887) - TabControl.GotFocus event not fired when SelectionIndex is set
- [500019](https://bugzilla.novell.com/show_bug.cgi?id=500019) - SSE2 used on system without SSE2
- [500075](https://bugzilla.novell.com/show_bug.cgi?id=500075) - \<%Page%> Inherits doesn't support C# syntax
- [500385](https://bugzilla.novell.com/show_bug.cgi?id=500385) - GetMethod fails to find private methods up the class hierarchy when using BindingFlags.NonPublic
- [500739](https://bugzilla.novell.com/show_bug.cgi?id=500739) - Error when accessing anything but default route using system.web.routing
- [501589](https://bugzilla.novell.com/show_bug.cgi?id=501589) - XElement Seems to Break
- [502029](https://bugzilla.novell.com/show_bug.cgi?id=502029) - DateTimePicker: some children are not accessible by orca
- [502274](https://bugzilla.novell.com/show_bug.cgi?id=502274) - HttpConnection does not unbind HttpListenerContext when KeepAlive is true
- [502555](https://bugzilla.novell.com/show_bug.cgi?id=502555) - Routing problems related to default parameters
- [502866](https://bugzilla.novell.com/show_bug.cgi?id=502866) - UDPClient.Receive does not honor Socket.ReceiveTimeout
- [503728](https://bugzilla.novell.com/show_bug.cgi?id=503728) - misused Type.GetInterfaceMap() causes runtime crash
- [504378](https://bugzilla.novell.com/show_bug.cgi?id=504378) - Routes in System.Web.Routing don't handle "Variable Number of Segments" correctly (Catchall)
- [504391](https://bugzilla.novell.com/show_bug.cgi?id=504391) - WebService.EnableDecompression crash
- [504411](https://bugzilla.novell.com/show_bug.cgi?id=504411) - Mprotect fails with ENOMEM in GC_remap
- [504615](https://bugzilla.novell.com/show_bug.cgi?id=504615) - \[PATCH\] Global.asax of precompiled sites not loaded
- [504667](https://bugzilla.novell.com/show_bug.cgi?id=504667) - \[gmcs\] compilation error when using partial static classes
- [505375](https://bugzilla.novell.com/show_bug.cgi?id=505375) - JIT does not optimize do-while loop correctly
- [505678](https://bugzilla.novell.com/show_bug.cgi?id=505678) - mono.bin crashes for System.Xml.XPath.AxisIterator.MoveNextCore
- [506144](https://bugzilla.novell.com/show_bug.cgi?id=506144) - Structs that contain Mono.Simd.Vector4f fields have broken sequential layout
- [506757](https://bugzilla.novell.com/show_bug.cgi?id=506757) - CS0507 when overriding public method in class generated by ikvmc
- [506915](https://bugzilla.novell.com/show_bug.cgi?id=506915) - Use of tertiary operator results in runtime stack trace but equivalent if/else code does not
- [507003](https://bugzilla.novell.com/show_bug.cgi?id=507003) - Error in Assembly.DoAssemblyResolve
- [507666](https://bugzilla.novell.com/show_bug.cgi?id=507666) - url-decode failed with encoded shift_jis query
- [507836](https://bugzilla.novell.com/show_bug.cgi?id=507836) - ListItem attributes aren't stored in view state
- [508167](https://bugzilla.novell.com/show_bug.cgi?id=508167) - RegisterHiddenField should not put a "id" in the input field in 1.1 profile
- [508389](https://bugzilla.novell.com/show_bug.cgi?id=508389) - Mono 2.4 crashes due to accessing freed data structures
- [508538](https://bugzilla.novell.com/show_bug.cgi?id=508538) - System.Reflection.TargetInvocationException when calling MethodInfo.invoke
- [508570](https://bugzilla.novell.com/show_bug.cgi?id=508570) - Generic MVC ViewMasterPage does not respect type
- [508649](https://bugzilla.novell.com/show_bug.cgi?id=508649) - 404 not found errors should be displayed even when custom errors are on (and there is no redirect)
- [508888](https://bugzilla.novell.com/show_bug.cgi?id=508888) - MonoVS version of mono breaks Graffiti
- [509069](https://bugzilla.novell.com/show_bug.cgi?id=509069) - Can't set different handlers for subdirectories
- [509092](https://bugzilla.novell.com/show_bug.cgi?id=509092) - 403 errors should be handled specially as well
- [509163](https://bugzilla.novell.com/show_bug.cgi?id=509163) - '\*' and ':' are not supported in ASP.NET virtual paths
- [509450](https://bugzilla.novell.com/show_bug.cgi?id=509450) - Web.config file modification is not detected
- [509475](https://bugzilla.novell.com/show_bug.cgi?id=509475) - Unclosed when \
- [509998](https://bugzilla.novell.com/show_bug.cgi?id=509998) - Web.config changes in subdirectories are not detected
- [510302](https://bugzilla.novell.com/show_bug.cgi?id=510302) - Theming asp.net application seems not work
- [510735](https://bugzilla.novell.com/show_bug.cgi?id=510735) - Location path is not verified to be a relative path
- [511414](https://bugzilla.novell.com/show_bug.cgi?id=511414) - Can't print from winforms
- [512028](https://bugzilla.novell.com/show_bug.cgi?id=512028) - \[Regression\] asp.net framework includetest fails on mono-2.4.2 using xsp2
- [512037](https://bugzilla.novell.com/show_bug.cgi?id=512037) - OutputCache directive Location parameter handling is broken
- [512485](https://bugzilla.novell.com/show_bug.cgi?id=512485) - \[PATCH\] deadlock in ReaderWriterLockSlim.EnterWriteLock
- [512535](https://bugzilla.novell.com/show_bug.cgi?id=512535) - Can't concatenate Item list error when compiling non-standard project with xbuild
- [513849](https://bugzilla.novell.com/show_bug.cgi?id=513849) - HttpListener does not release the specified port by listener prefixes.
- [513965](https://bugzilla.novell.com/show_bug.cgi?id=513965) - Please Add IE8.0 to browscap.ini
## Installing Mono 2.4.2
**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-2.4.2.tar.gz
$ cd libgdiplus-2.4.2
$ ./configure
$ make
$ make install
```
Then compile Mono itself:
``` bash
$ tar xzf mono-2.4.2.tar.gz
$ cd mono-2.4.2
$ ./configure
$ make
$ make install
```