Asp.net不同二級域名和主域名共享cookies（單點登錄）

這裡主要采用cookIEs共享，覺得比較方便。
步驟1：[寫cookIEs]
            //創建一個HttpCookIE對象
            HttpCookie cookie = new HttpCookIE("uId");
            //設定此cookIEs值
            cookIE.Value = "uIdValue";
            cookIE.Domain= "company.com";
            //設定cookIE的生命周期，在這裡定義為一個小時
            DateTime dtNow = DateTime.Now;
            TimeSpan tsMinute = new TimeSpan(0, 1, 0, 0);
            cookIE.Expires = dtNow + tsMinute;
            //加入此cookIE
            Response.Cookies.Add(cookIE);
            Response.Write(Request.Cookies["uId"].Value.ToString() + "CookIE創建完畢 <br > <hr > ");
步驟2：[讀cookIEs]
           HttpCookie cookie = Request.CookIEs["uId"];
            if (cookIE != null)
            {
                   Response.Write(Request.CookIEs["uId"].Value.ToString();
            }