/usr/lib/mono/2.0/Mono.XBuild.Tasks.dll*
/usr/lib/mono/3.5/Mono.XBuild.Tasks.dll*
/usr/lib/mono/gac/Mono.XBuild.Tasks/2.0.0.0__*/
/usr/lib/mono/gac/Mono.XBuild.Tasks/3.5.0.0__*/