internal void LoadDocument(string filename)
        {
            DocumentWindow window = FindDocumentWindow(filename);

            if (window != null)
            {
                window.Select();
                ReloadWindow(window);
            }
            else if (!File.Exists(filename))
            {
                Errors.FileNotFound(filename);
            }
            else
            {
                NAntDocument doc = new NAntDocument(filename, _outputWindow, _options);
                doc.BuildFinished += _mainForm.SetStateStopped;

                Settings.Default.OpenScriptDir = doc.Directory;
                Settings.Default.Save();

                window = new DocumentWindow(doc.FullName);
                SetupWindow(window, doc);

                RecentItems.Add(doc.FullName);

                // Parse the file in the background
                _loader.RunWorkerAsync();
            }
        }