Mono 2.10.x version, Not MonoTouch or Mono for Android

I tried to use OxyPlot with Mono on Linux (2.10.8) and when I run it it complains about:

Mono: Could not load file or assembly 'System.core, Version 2.0.5.0 ...'

Has anyone tried this?

Try referencing the NET40 version of the OxyPlot core library, maybe using the PCL version is the problem?
Shouldn't PCL assemblies also work with Mono? (I have not tried myself)
http://slodge.blogspot.no/2012/12/cross-platform-winrt-monodroid.html

Tried that, made no difference, same error:

Mono: The following assembly referenced from /home/cds/eric/op/testoxy/bin/Debug/OxyPlot.dll could not be loaded:

 Assembly:   System.Core    (assemblyref_index=2)
 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 (/home/cds/eric/op/testoxy/bin/Debug/).

Mono: Failed to load assembly OxyPlot[0xb5728fb8]

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.

Unhandled Exception: System.TypeLoadException: A type load exception has occurred.
at (wrapper remoting-invoke-with-check) testoxy.Form1:.ctor ()
at testoxy.Program.Main () [0x00000] in <filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeLoadException: A type load exception has occurred.
at (wrapper remoting-invoke-with-check) testoxy.Form1:.ctor ()
at testoxy.Program.Main () [0x00000] in <filename unknown>:0