On Mon, 2005-11-28 at 15:09 +0100, Salvatore Scarciglia wrote: > Mono compiler says that AboutDialog does not exist in Gtk namespace. GtkAboutDialog was introduced in GTK+ 2.6, so you need Gtk# 2.6 in order to use this type. Since Gtk# 2.6 was a source-only release, it's unlikely that you currently have it installed. - Jon