如何用c#解析word(1)--获得文档中的style标签

前几天 受人指点 随手写了这个 代码
:注 在vb中实现此功能很简单 但是在c#中却不是太简单，很多方法
用法不同 当时让我 痛苦了好半天   
word.document doc=null;
   Word.ApplicationClass app=new ApplicationClass();
   Word.Style _style;
    string _XmlStr="";
   object missing=System.Reflection.Missing.Value;
   try
   {
    object FileName=Server.MapPath(".")+"\\test.doc";
    object readOnly = false;
    object isVisible = true;
    object index=0;
    doc=app.Documents.Open(ref FileName,ref missing,ref readOnly,ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref isVisible,ref missing,ref missing,ref missing,ref missing);
     
    foreach(Word.Paragraph pa in app.ActiveDocument.Paragraphs)
    {
     _style=(Word.Style)pa.get_Style();
     this.listStyle.Items.Add(_style.NameLocal);

    }
   
   }
   catch(Exception ex)
   {
    js.ShowMsg(ex.Message);
   }
   finally
   {
    doc.Close(ref missing,ref missing,ref missing);
     app.Quit(ref missing,ref missing,ref missing);
    //app.ActiveDocument.Close(ref missing,ref missing,ref missing);
    GC.Collect();
   }