LitJson through exception on centos using mono - exception

Question

I compiled mono source code(using ./configure, make, make install) for centos and seems it's ok.
mono --version
Mono JIT compiler version 2.10.9 (tarball 2013年 01月 02日 星期三 13:43:05 CST)
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: x86
Disabled: none
Misc: softdebug
LLVM: supported, not enabled.
GC: Included Boehm (with typed GC and Parallel Mark)
But when I try to run a .ashx file which invoke LitJson, I got
<p><strong>Description: </strong>HTTP 500. Error processing request.</p>
<p><strong>Stack Trace: </strong></p><table summary="Stack Trace" class="sampleCode">
<tr><td><pre>System.MissingMethodException: Method not found: 'System.Reflection.MethodInfo.op_Inequality'.
at LitJson.JsonMapper.ToObject (System.Type type, System.String json) [0x00000] in <filename unknown>:0
at MobiusServer.Login..ctor (System.String jsondata) [0x00000] in <filename unknown>:0
at MobiusServer.MobiusHandler.ProcessRequest (System.Web.HttpContext context) [0x00000] in <filename unknown>:0
at System.Web.HttpApplication+<Pipeline>c__Iterator3.MoveNext () [0x00000] in <filename unknown>:0
at System.Web.HttpApplication.Tick () [0x00000] in <filename unknown>:0 </pre></td></tr>
</table>
<hr style="color: silver"/><strong>Version information: </strong> Mono Runtime Version: <tt>2.10.9 (tarball 2013/01/02 Wed 13:43:05 CST)</tt>; ASP.NET Version: <tt>2.0.50727.1433</tt></body></html>
<!--
[System.MissingMethodException]: Method not found: 'System.Reflection.MethodInfo.op_Inequality'.
at LitJson.JsonMapper.ToObject (System.Type type, System.String json) [0x00000] in <filename unknown>:0
at MobiusServer.Login..ctor (System.String jsondata) [0x00000] in <filename unknown>:0
at MobiusServer.MobiusHandler.ProcessRequest (System.Web.HttpContext context) [0x00000] in <filename unknown>:0
at System.Web.HttpApplication+<Pipeline>c__Iterator3.MoveNext () [0x00000] in <filename unknown>:0
at System.Web.HttpApplication.Tick () [0x00000] in <filename unknown>:0
-->
I can run the same program on my mac os x which also installed mono 2.10.9 runtime.
Did I do something wrong or miss something?
Thanks!!

Answer 1

After a whole day research, It turns out that mod_mono will use .NET 2.0(mod-mono-server) compile my program but my program needs .NET 4.0
After altered mod_mono.conf file below, problem resolved!
# mod_mono.conf
# Achtung! This file may be overwritten
# Use 'include mod_mono.conf' from other configuration file
# to load mod_mono module.
<IfModule !mod_mono.c>
LoadModule mono_module /usr/lib/httpd/modules/mod_mono.so
</IfModule>
<IfModule mod_headers.c>
Header set X-Powered-By "Mono"
</IfModule>
MonoAutoApplication enabled
MonoDebug true
MonoServerPath "/etc/mono/bin/mod-mono-server4"
MonoUnixSocket "/tmp/.mod_mono"
AddType application/x-asp-net .aspx
AddType application/x-asp-net .asmx
AddType application/x-asp-net .ashx
AddType application/x-asp-net .asax
AddType application/x-asp-net .ascx
AddType application/x-asp-net .soap
AddType application/x-asp-net .rem
AddType application/x-asp-net .axd
AddType application/x-asp-net .cs
AddType application/x-asp-net .vb
AddType application/x-asp-net .master
AddType application/x-asp-net .sitemap
AddType application/x-asp-net .resources
AddType application/x-asp-net .skin
AddType application/x-asp-net .browser
AddType application/x-asp-net .webinfo
AddType application/x-asp-net .resx
AddType application/x-asp-net .licx
AddType application/x-asp-net .csproj
AddType application/x-asp-net .vbproj
AddType application/x-asp-net .config
AddType application/x-asp-net .Config
AddType application/x-asp-net .dll
DirectoryIndex index.aspx
DirectoryIndex Default.aspx
DirectoryIndex default.aspx