ASP.NET与Silverlight(aspx与xaml) Cookies传值

silverlight:

        ///<summary>
        /// Silverlight 创建cookie
        ///</summary>
                DateTime expries = DateTime.UtcNow + TimeSpan.FromDays(1); 
                string cookie = string.Format("{0}={1};expries={2}", "username",Value,expries);
                HtmlPage.Document.SetProperty("Cookie", cookie);
        ///<summary>
        /// Silverlight Read cookie
        ///</summary>
            String[] cookies = HtmlPage.Document.Cookies.Split(';');
            foreach (String cookie in cookies)
            {
                String[] keyValues = cookie.Split('=');
                {
                    if (keyValues[0].Trim() == "username")
                    {
                        MessageBox.Show(keyValues[1].Trim());
                    }
                }

            }

aspx:

        ///<summary>
        /// Creat cookie
        ///</summary>
            HttpCookie cookie = new HttpCookie("username");
            cookie.Value = Value.Trim(); 
            cookie.Expires = DateTime.Now.AddDays(1);
            Response.Cookies.Add(cookie);
        ///<summary>
        /// Read cookie
        ///</summary>
            HttpCookie cookie = Request.Cookies["username"]; 
            Value=cookie.Value;