.NET常用的应用程序根路径

网上没有找到太合适的，自己写了一个，经过简单测试，满足各种情况

           #region 生成url应用程序绝对路径 （http://localhost:8080/website）
            string absPath = System.Web.HttpContext.Current.Request.Url.AbsolutePath;
            absPath = absPath.Substring(System.Web.HttpContext.Current.Request.ApplicationPath.Length);
            this._apppath = System.Web.HttpContext.Current.Request.Url.AbsoluteUri.Replace(absPath, "");
            this._apppath.TrimEnd('/');
            #endregion

            #region 生成应用程序硬盘物理路径(D:\wwwroot\website)
            this._physicalpath = System.Web.HttpContext.Current.Request.ServerVariables["APPL_PHYSICAL_PATH"].ToString().TrimEnd('\\');
            #endregion

            #region 生成url应用程序皮肤绝对路径(http://localhost:8080/website/App_Themes/green)
            System.Web.Configuration.PagesSection _ps = (System.Web.Configuration.PagesSection)System.Configuration.ConfigurationManager.GetSection("system.web/pages");
            this._themename = _ps.Theme;
            this._fullthemepath = string.Format("{0}/App_Themes/{1}", this._apppath, _ps.Theme).TrimEnd('/');
            #endregion