bob@book /usr/home/bob/Desktop/EjemploNHibernate2> mono Dato.exe Hello World!

** (Dato.exe:65027): WARNING **: The following assembly referenced from /usr/local/lib/mono/gac/NHibernate/0.8.4.0__154fdcb44c4484fc/NHibernate.dll could not be loaded:
     Assembly:   log4net    (assemblyref_index=4)
     Version:    1.2.0.30714
     Public Key: b32731d11ce58905
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 (/usr/local/lib/mono/gac/NHibernate/0.8.4.0__154fdcb44c4484fc).


** (Dato.exe:65027): WARNING **: The class log4net.ILog could not be loaded, used in /usr/local/lib/mono/gac/NHibernate/0.8.4.0__154fdcb44c4484fc/NHibernate.dll (token 0x01000019)

** (Dato.exe:65027): WARNING **: Missing method GetLogger in assembly /usr/local/lib/mono/gac/NHibernate/0.8.4.0__154fdcb44c4484fc/NHibernate.dll, type log4net.LogManager

Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required.
in <0x00000> <unknown method>
in <0x00037> Phillip.MainClass:.ctor ()
in <0x00021> Phillip.MainClass:Main (System.String[] args)