It appears there is a problem with running older .Net apps on the latest
versions of Ubuntu. If you compile for .Net 2.0 (perhaps because that is
your lowest common denominator, because you are working cross-platform
and you know some people will still be using WinXP without the huge .Net
3/3.5/4 updates) and run it on Ubuntu then you currently get an instant
crash with a message like "Missing method
System.Type::op_Inequality(Type,Type) in assembly
/usr/lib/mono/2.0/mscorlib.dll, referenced in assembly
/usr/lib/mono/gac/gtk-sharp/2.12.0.0__35e10195dab3c99f/gtk-sharp.dll"
It looks like this problem is quite prevalent and problematic
(https://bugs.launchpad.net/ubuntu/+source/mono/+bug/882501,
http://stackoverflow.com/questions/10473868/mono-gtk-hello-world-failing-missing-method,
and the rest of Google). The two fixes people have are "recompile" (only
an option if you're *only* targeting Ubuntu and want to use v4.0) or
"add the --runtime=v4.0 switch" to force a 2.0 app to run as 4.0.
Based on the assembly mentioned in error and what I've picked up online,
am I right in understanding that this is a purely Ubuntu-caused problem
because GTK# is now build with the .Net 4.0-compatible compiler? Is
there any way they can fix this, or are we stuck with it? And are there
any sensible and non-hackish ways to work around this in the meantime?
I'm working on my own Bash wrapper at the moment to fix this only when
necessary
(http://dev.ibboard.co.uk/repos/IBDev-IBBoard.WarFoundry.GUI.GTK/files/tip/WarFoundry.sh)
but I'm sure there must be better ways to do it.
Thanks.
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