Question

I’m running mono 2.10.6 on openSUSE 12.1. Shouldn’t there be a System.Data.dll in either /usr/lib/mono/4.0 or /usr/lib/mono/2.0 ?

I’m testing a .NET application compiled on windows. The application has a reference to automapper and I get the following error when I try to run the application:

Unhandled Exception: System.TypeInitializationException: An exception  
was thrown by the type initializer for AutoMapper.Mappers.DataReaderMapper --->
System.IO.FileNotFoundException: Could not load file or assembly 'System.Data,
Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its
dependencies.

File name: 'System.Data, Version=4.0.0.0, Culture=neutral, 
PublicKeyToken=b77a5c561934e089'

Here is the output of mono –version:

linux-19xt:~ # mono --version
Mono JIT compiler version 2.10.6 (tarball Sat Oct 29 18:16:09 UTC 2011)
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
    TLS:           __thread
    SIGSEGV:       altstack
    Notifications: epoll
    Architecture:  amd64
    Disabled:      none
    Misc:          debugger softdebug
    LLVM:          supported, not enabled.
    GC:            Included Boehm (with typed GC and Parallel Mark)

Answer 1

Install “mono-complete” or “monodevelop” and you should no longer see this issue. On unbuntu the command is…

sudo apt-get install mono-complete

or for the monodevelop ide (which also installs mono-complete)

sudo apt-get install monodevelop

I had 3 vms (1 with just the mono runtime installed, 1 with the monodevelop ide installed, and 1 with mono-complete installed) all running the exact same executable but only one that saw the issue you described was the one with only the mono runtime installed. Running the “mono-complete” command above fixed the issue.