Graphviz.Graph.GetPlugins C# (CSharp) Method

        public static IList<string> GetPlugins(API api, bool showFullPath)
        {
            SortedList<string, string> plugins = new SortedList<string, string>();
            IntPtr pluginList = gvplugin_list(_context, api, showFullPath ? ":" : "");
            foreach (string nextPlugin in Marshal.PtrToStringAnsi(pluginList).Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries))
            {
                int lastColon = nextPlugin.LastIndexOf(':');
                string plugin = nextPlugin.Substring(0, lastColon == -1 ? nextPlugin.Length : lastColon);
                plugins[plugin] = plugin;
            }

            free(pluginList);
            return plugins.Keys;
        }