I should add that System.Core does exist in /opt/mono64/lib/mono/4.0 -- View this message in context: http://mono.1490590.n4.nabble.com/The-assembly-mscorlib-dll-was-not-found-or-could-not-be-loaded-tp4662752p4662770.html Sent from the Mono - General mailing list archive at Nabble.com.