Banshee.Gui.Widgets.TrackInfoDisplay.GetByFrom C# (CSharp) Method

        private string GetByFrom (string artist, string display_artist, string album, string display_album, bool unknown_ok)
        {

            bool has_artist = !String.IsNullOrEmpty (artist);
            bool has_album = !String.IsNullOrEmpty (album);

            string markup = null;
            if (has_artist && has_album) {
                // Translators: {0} and {1} are for markup so ignore them, {2} and {3}
                // are Artist Name and Album Title, respectively;
                // e.g. 'by Parkway Drive from Killing with a Smile'
                markup = MarkupFormat (Catalog.GetString ("{0}by{1} {2} {0}from{1} {3}"), display_artist, display_album);
            } else if (has_album) {
                // Translators: {0} and {1} are for markup so ignore them, {2} is for Album Title;
                // e.g. 'from Killing with a Smile'
                markup = MarkupFormat (Catalog.GetString ("{0}from{1} {2}"), display_album);
            } else if (has_artist || unknown_ok) {
                // Translators: {0} and {1} are for markup so ignore them, {2} is for Artist Name;
                // e.g. 'by Parkway Drive'
                markup = MarkupFormat (Catalog.GetString ("{0}by{1} {2}"), display_artist);
            }
            return markup;
        }
    }