public virtual void Open(string filename)
{
file = FileService.GetOrCreateOpenedFile(filename);
files.Clear();
files.Add(file);
file.CurrentView = this;
this.Load(file, file.OpenRead());
textEditorControl.InitializeFormatter();
textEditorControl.ActivateQuickClassBrowserOnDemand();
file.CloseIfAllViewsClosed();
this.ToolTipText = filename;
TabText = Path.GetFileName(filename);
HaveFileName = true;
}