I have been trying to get Autofac 3.0.1 working on Mono, but have so far
been unsuccessful. When I try to run an application that references
Autofac 3.0.1 on Mono 3.0.5, I get the following exception:
Mono: Assembly Loader probing location:
'/opt/mono-3.0.5/lib/mono/4.5/mscorlib.dll'.
Mono: Image addref mscorlib[0x14ce2c70] ->
/opt/mono-3.0.5/lib/mono/4.5/mscorlib.dll[0x14ce1ec0]: 2
Mono: Assembly Loader probing location:
'/opt/mono-3.0.5/lib/mono/4.5/mscorlib.dll'.
Mono: Assembly Loader loaded assembly from location:
'/opt/mono-3.0.5/lib/mono/4.5/mscorlib.dll'.
Mono: Assembly mscorlib[0x14ce2c70] added to domain
ConsoleApplication1.exe, ref_count=1
Mono: Assembly Loader probing location: 'ConsoleApplication1.exe'.
Mono: Image addref ConsoleApplication1[0x14d20230] ->
/var/www/sites/erik/monoconsole/ConsoleApplication1.exe[0x14d1f4a0]: 2
Mono: Assembly ConsoleApplication1[0x14d20230] added to domain
ConsoleApplication1.exe, ref_count=1
Mono: Assembly Loader loaded assembly from location:
'ConsoleApplication1.exe'.
Mono: Assembly Loader probing location: 'ConsoleApplication1.exe'.
Mono: Assembly Ref addref ConsoleApplication1[0x14d20230] ->
mscorlib[0x14ce2c70]: 2
Mono: Assembly Loader probing location:
'/var/www/sites/erik/monoconsole/Autofac.dll'.
Mono: Image addref Autofac[0x14d269b0] ->
/var/www/sites/erik/monoconsole/Autofac.dll[0x14d25c40]: 2
Mono: Assembly Autofac[0x14d269b0] added to domain
ConsoleApplication1.exe, ref_count=1
Mono: Assembly Loader loaded assembly from location:
'/var/www/sites/erik/monoconsole/Autofac.dll'.
Mono: Assembly Ref addref ConsoleApplication1[0x14d20230] ->
Autofac[0x14d269b0]: 2
Mono: The request to load the retargetable assembly mscorlib
v2.0.5.0 was remapped to mscorlib v4.0.0.0
Mono: Assembly Ref addref Autofac[0x14d269b0] ->
mscorlib[0x14ce2c70]: 3
Mono: The request to load the retargetable assembly System.Core
v2.0.5.0 was remapped to System.Core v4.0.0.0
Mono: Assembly Loader probing location:
'/opt/mono-3.0.5/lib/mono/gac/System.Core/4.0.0.0__7cec85d7bea7798e/System.Core.dll'.
Mono: Assembly Loader probing location:
'/var/www/sites/erik/monoconsole/System.Core.dll'.
Mono: Assembly Loader probing location:
'/opt/mono-3.0.5/lib/System.Core.dll'.
Mono: Assembly Loader probing location:
'/opt/mono-3.0.5/lib/mono/gac/System.Core/4.0.0.0__7cec85d7bea7798e/System.Core.exe'.
Mono: Assembly Loader probing location:
'/var/www/sites/erik/monoconsole/System.Core.exe'.
Mono: Assembly Loader probing location:
'/opt/mono-3.0.5/lib/System.Core.exe'.
Mono: The following assembly referenced from
/var/www/sites/erik/monoconsole/Autofac.dll could not be loaded:
Assembly: System.Core (assemblyref_index=1)
Version: 2.0.5.0
Public Key: 7cec85d7bea7798e
The assembly was not found in the Global Assembly Cache, a path
listed in the MONO_PATH environment variable, or in the location of the
executing assembly (/var/www/sites/erik/monoconsole/).
Mono: Failed to load assembly Autofac[0x14d269b0]
Mono: Could not load file or assembly 'System.Core,
Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e,
Retargetable=Yes' or one of its dependencies.
Missing method .ctor in assembly
/var/www/sites/erik/monoconsole/Autofac.dll, type
System.Runtime.CompilerServices.ExtensionAttribute
Can't find custom attr constructor image:
/var/www/sites/erik/monoconsole/Autofac.dll mtoken: 0x0a000015
Hello!
Mono: Unloading domain ConsoleApplication1.exe[0x2aaaab6f1cc0],
assembly mscorlib[0x14ce2c70], ref_count=3
Mono: Unloading domain ConsoleApplication1.exe[0x2aaaab6f1cc0],
assembly ConsoleApplication1[0x14d20230], ref_count=1
Mono: Unloading assembly ConsoleApplication1 [0x14d20230].
Mono: Unloading image
/var/www/sites/erik/monoconsole/ConsoleApplication1.exe [0x14d1f4a0].
Mono: Unloading domain ConsoleApplication1.exe[0x2aaaab6f1cc0],
assembly Autofac[0x14d269b0], ref_count=1
Mono: Unloading assembly Autofac [0x14d269b0].
Mono: Unloading image /var/www/sites/erik/monoconsole/Autofac.dll
[0x14d25c40].
Mono: Unloading assembly mscorlib [0x14ce2c70].
Mono: Unloading image /opt/mono-3.0.5/lib/mono/4.5/mscorlib.dll
[0x14ce1ec0].
There are several things to note. First, it appears that System.Core
2.0.5.0 could not be loaded. Could this be due to Autofac 3.0.1 being a
portable class library?
This problem also results in the second issue, where there is a Missing
method .ctor in System.Runtime.CompilerServices.ExtensionAttribute. I
have found some information about this problem, and it appears that this
problem is due to the ExtensionAttribute class being moved from one DLL
to another:
http://www.lextm.com/2013/02/how-to-use-nuget-on-mono-part-iv.html
This problem can be reproduced as follows (see
https://gist.github.com/ErikSchierboom/5047101):
1. Create a .NET 4.0 console application
2. Add a reference to Autofac 3.0.1 (e.g. through NuGet)
3. Create an instance of the `ContainerBuilder` class
4. Build the console application
5. Run the console application under Mono
Does anyone have an idea on how to solve this problem?
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