gtkhtml-sharp 2.12.0.0 Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. Enumeration for how HTML font styles can be changed. System.Enum Field Gtk.HTMLFontStyleShift Bold font style. Field Gtk.HTMLFontStyleShift Italic font style. Field Gtk.HTMLFontStyleShift Underlined font style. Field Gtk.HTMLFontStyleShift Strikeout font style. Field Gtk.HTMLFontStyleShift Fixed-width font style. Field Gtk.HTMLFontStyleShift Subscript font style. Field Gtk.HTMLFontStyleShift Superscript font style.