Serge and Arun. Why would you want to use C# to develop bioinformatics software? I don't know much about it but I thought it was Windows only. David -- _______________________________________________________________ David P.Leader, Biochemistry and Molecular Biology Davidson Building, University of Glasgow, Glasgow G12 8QQ, UK Phone: +44 41 330-5905 d.leader at bio.gla.ac.uk http://doolittle.ibls.gla.ac.uk/leader _______________________________________________________________