I found it in the Mapguide Web API Reference. It should be like this now: MgMap map = new MgMap(siteConnection); -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Compiler-Error-Message-CS0122-tp5240326p5240336.html Sent from the MapGuide Users mailing list archive at Nabble.com.