[Mono-list] mono on ubuntu 12.04 LTS

[yuanbyu]

I am having some problem running Mono on Ubuntu.  After installing mono with:

sudo apt-get install mono-complete

I was able to run a simple hello world program.  However when I tried the
following program:

using Gtk;
using System;
 
class Hello {
        static void Main()
        {
                Application.Init ();
                Window window = new Window ("helloworld");
                window.Show();
 
                Application.Run ();
        }
}

It failed with the following error message:

temp$ mono hello1.exe
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

Unhandled Exception: System.MissingMethodException: Method not found:
'System.Type.op_Inequality'.
  at Gtk.Window..ctor (System.String title) [0x00000] in <filename
unknown>:0 
  at Hello.Main () [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Method not
found: 'System.Type.op_Inequality'.
  at Gtk.Window..ctor (System.String title) [0x00000] in <filename
unknown>:0 
  at Hello.Main () [0x00000] in <filename unknown>:0 
temp$ mono --version
Mono JIT compiler version 2.10.8.1 (Debian 2.10.8.1-1ubuntu2.2)
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:          softdebug 
	LLVM:          supported, not enabled.
	GC:            Included Boehm (with typed GC and Parallel Mark)
temp$ gmcs --version
Mono C# compiler version 2.10.8.1

Any help is greatly appreciated.
-Yuan



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