Hello! My project is set to use .NET 3.5, however I still can't find System.Collections.Generic.HashSet<T>. What can I do now? Thank you! -- View this message in context: http://mono.1490590.n4.nabble.com/Target-3-5-Runtime-tp1515840p3176603.html Sent from the Mono - MonoDevelop IDE mailing list archive at Nabble.com.