$ MONO_LOG_MASK="dll,asm,cfg" LANG=C MONO_LOG_LEVEL="debug" mono tester.exe
Mono-INFO: Assembly Loader probing location: '/usr/lib/mono/1.0/mscorlib.dll'.
Mono-INFO: Image addref mscorlib 0x9048398 -> /usr/lib/mono/1.0/mscorlib.dll 0x9041298: 2

Mono-INFO: Assembly Loader loaded assembly from location: '/usr/lib/mono/1.0/mscorlib.dll'.
Mono-INFO: Config attempting to parse: '/usr/lib/mono/1.0/mscorlib.dll.config'.
Mono-INFO: Config attempting to parse: '/etc/mono/assemblies/mscorlib/mscorlib.config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/assemblies/mscorlib/mscorlib.config'.
Mono-INFO: Assembly mscorlib 0x9048398 added to domain tester.exe, ref_count=1

Mono-INFO: Config attempting to parse: '/etc/mono/config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/config'.
Mono-INFO: Assembly Loader probing location: 'tester.exe'.
Mono-INFO: Image addref tester 0x9063a68 -> /home/asbjorn/Projects/tester/tester/bin/Debug/tester.exe 0x903e490: 3

Mono-INFO: Assembly tester 0x9063a68 added to domain tester.exe, ref_count=1

Mono-INFO: Assembly Loader loaded assembly from location: 'tester.exe'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/Projects/tester/tester/bin/Debug/tester.exe.config'.
Mono-INFO: Config attempting to parse: '/etc/mono/assemblies/tester/tester.config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/assemblies/tester/tester.config'.
Mono-INFO: Assembly Loader probing location: 'tester.exe'.
Mono-INFO: Assembly Ref addref tester 0x9063a68 -> mscorlib 0x9048398: 2

Mono-INFO: Assembly Loader probing location: '/home/asbjorn/Projects/tester/tester/bin/Debug/gtk-sharp.dll'.
Mono-INFO: Image addref gtk-sharp 0x9078290 -> /home/asbjorn/Projects/tester/tester/bin/Debug/gtk-sharp.dll 0x906ed68: 2

Mono-INFO: Assembly gtk-sharp 0x9078290 added to domain tester.exe, ref_count=1

Mono-INFO: Assembly Loader loaded assembly from location: '/home/asbjorn/Projects/tester/tester/bin/Debug/gtk-sharp.dll'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/Projects/tester/tester/bin/Debug/gtk-sharp.dll.config'.
Mono-INFO: Config attempting to parse: '/etc/mono/assemblies/gtk-sharp/gtk-sharp.config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/assemblies/gtk-sharp/gtk-sharp.config'.
Mono-INFO: Assembly Ref addref tester 0x9063a68 -> gtk-sharp 0x9078290: 2

Mono-INFO: Assembly Loader probing location: '/usr/lib/mono/gac/glib-sharp/2.10.0.0__35e10195dab3c99f/glib-sharp.dll'.
Mono-INFO: Image addref glib-sharp 0x907c498 -> /usr/lib/mono/gac/glib-sharp/2.10.0.0__35e10195dab3c99f/glib-sharp.dll 0x9079600: 2

Mono-INFO: Assembly glib-sharp 0x907c498 added to domain tester.exe, ref_count=1

Mono-INFO: Assembly Loader loaded assembly from location: '/usr/lib/mono/gac/glib-sharp/2.10.0.0__35e10195dab3c99f/glib-sharp.dll'.
Mono-INFO: Config attempting to parse: '/usr/lib/mono/gac/glib-sharp/2.10.0.0__35e10195dab3c99f/glib-sharp.dll.config'.
Mono-INFO: Config attempting to parse: '/etc/mono/assemblies/glib-sharp/glib-sharp.config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/assemblies/glib-sharp/glib-sharp.config'.
Mono-INFO: Assembly Ref addref gtk-sharp 0x9078290 -> glib-sharp 0x907c498: 2

Mono-INFO: Assembly Ref addref glib-sharp 0x907c498 -> mscorlib 0x9048398: 3

Mono-INFO: Assembly Loader probing location: '/usr/lib/mono/gac/atk-sharp/2.10.0.0__35e10195dab3c99f/atk-sharp.dll'.
Mono-INFO: Image addref atk-sharp 0x9080740 -> /usr/lib/mono/gac/atk-sharp/2.10.0.0__35e10195dab3c99f/atk-sharp.dll 0x907cd68: 2

Mono-INFO: Assembly atk-sharp 0x9080740 added to domain tester.exe, ref_count=1

Mono-INFO: Assembly Loader loaded assembly from location: '/usr/lib/mono/gac/atk-sharp/2.10.0.0__35e10195dab3c99f/atk-sharp.dll'.
Mono-INFO: Config attempting to parse: '/usr/lib/mono/gac/atk-sharp/2.10.0.0__35e10195dab3c99f/atk-sharp.dll.config'.
Mono-INFO: Config attempting to parse: '/etc/mono/assemblies/atk-sharp/atk-sharp.config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/assemblies/atk-sharp/atk-sharp.config'.
Mono-INFO: Assembly Ref addref gtk-sharp 0x9078290 -> atk-sharp 0x9080740: 2

Mono-INFO: Assembly Ref addref atk-sharp 0x9080740 -> glib-sharp 0x907c498: 3

Mono-INFO: Assembly Ref addref gtk-sharp 0x9078290 -> mscorlib 0x9048398: 4

Mono-INFO: Assembly Loader probing location: '/usr/lib/mono/gac/System/1.0.5000.0__b77a5c561934e089/System.dll'.
Mono-INFO: Image addref System 0x9089730 -> /usr/lib/mono/gac/System/1.0.5000.0__b77a5c561934e089/System.dll 0x9082b98: 2

Mono-INFO: Assembly System 0x9089730 added to domain tester.exe, ref_count=1

Mono-INFO: Assembly Loader loaded assembly from location: '/usr/lib/mono/gac/System/1.0.5000.0__b77a5c561934e089/System.dll'.
Mono-INFO: Config attempting to parse: '/usr/lib/mono/gac/System/1.0.5000.0__b77a5c561934e089/System.dll.config'.
Mono-INFO: Config attempting to parse: '/etc/mono/assemblies/System/System.config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/assemblies/System/System.config'.
Mono-INFO: Assembly Ref addref glib-sharp 0x907c498 -> System 0x9089730: 2

Mono-INFO: Assembly Ref addref System 0x9089730 -> mscorlib 0x9048398: 5

Mono-INFO: Assembly Loader probing location: '/home/asbjorn/Projects/tester/tester/bin/Debug/gdk-sharp.dll'.
Mono-INFO: Image addref gdk-sharp 0x909c508 -> /home/asbjorn/Projects/tester/tester/bin/Debug/gdk-sharp.dll 0x90a3368: 2

Mono-INFO: Assembly gdk-sharp 0x909c508 added to domain tester.exe, ref_count=1

Mono-INFO: Assembly Loader loaded assembly from location: '/home/asbjorn/Projects/tester/tester/bin/Debug/gdk-sharp.dll'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/Projects/tester/tester/bin/Debug/gdk-sharp.dll.config'.
Mono-INFO: Config attempting to parse: '/etc/mono/assemblies/gdk-sharp/gdk-sharp.config'.
Mono-INFO: Config attempting to parse: '/home/asbjorn/.mono/assemblies/gdk-sharp/gdk-sharp.config'.
Mono-INFO: Assembly Ref addref gtk-sharp 0x9078290 -> gdk-sharp 0x909c508: 2

Mono-INFO: Assembly Ref addref gdk-sharp 0x909c508 -> glib-sharp 0x907c498: 4

Mono-INFO: Assembly Ref addref gdk-sharp 0x909c508 -> mscorlib 0x9048398: 6

Mono-INFO: DllImport attempting to load: 'libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport loading location: 'libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport error loading library: 'libgtk-win32-2.0-0.dll: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading library: './libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport error loading library './libgtk-win32-2.0-0.dll: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading: 'libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport error loading library 'libgtk-win32-2.0-0.dll: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading location: 'libgtk-win32-2.0-0'.
Mono-INFO: DllImport error loading library: 'libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading library: './libgtk-win32-2.0-0'.
Mono-INFO: DllImport error loading library './libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading: 'libgtk-win32-2.0-0'.
Mono-INFO: DllImport error loading library 'libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.

(tester.exe:4639): Mono-WARNING **: DllImport unable to load library 'libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport attempting to load: 'libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport loading location: 'libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport error loading library: 'libgtk-win32-2.0-0.dll: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading library: './libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport error loading library './libgtk-win32-2.0-0.dll: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading: 'libgtk-win32-2.0-0.dll'.
Mono-INFO: DllImport error loading library 'libgtk-win32-2.0-0.dll: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading location: 'libgtk-win32-2.0-0'.
Mono-INFO: DllImport error loading library: 'libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading library: './libgtk-win32-2.0-0'.
Mono-INFO: DllImport error loading library './libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.
Mono-INFO: DllImport loading: 'libgtk-win32-2.0-0'.
Mono-INFO: DllImport error loading library 'libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.

(tester.exe:4639): Mono-WARNING **: DllImport unable to load library 'libgtk-win32-2.0-0: cannot open shared object file: No such file or directory'.

Unhandled Exception: System.DllNotFoundException: libgtk-win32-2.0-0.dll
  at (wrapper managed-to-native) Gtk.Application:gtk_init (int&,intptr&)
  at Gtk.Application.Init () [0x00000] 
  at tester.MainClass.Main (System.String[] args) [0x00000]