c#读取简单的TXT文件

private string ReadPath()
    ...{
        string str = "";
        string[] tmp;
        string path = "";
        string CurrentPath = Server.MapPath(".");
        StreamReader sr=null;
        try
        ...{
            sr = new StreamReader(CurrentPath + "/config.txt", System.Text.Encoding.Default);
            while ((str = sr.ReadLine()) != null)
            ...{
                tmp = str.Split('/');
                path = tmp[0].ToString();
            }
            sr.Close();
        }
        catch (Exception)
        ...{
            sr.Close();
            return path;
        }
        finally
        ...{
            sr.Close();
        }
        return path;
    }