ASP.net Session原理「建议收藏」

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
///SessionMgr 的摘要说明
/// </summary>
public class SessionMgr
{

  
    private static IDictionary<string, IDictionary<string, object>> data = new Dictionary<string, IDictionary<string, object>>();
    public static IDictionary<string, object> GetSession(string sessionId)
    {
        if (data.ContainsKey(sessionId))
        {
            return data[sessionId];
        }
        else
        {
            IDictionary<string, object> session = new Dictionary<string, object>();
            data[sessionId] = session;
            return session;
        }
    }

    public static IDictionary<string, object> GetSession()
    {
        throw new NotImplementedException();
    }

}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class sessionweb : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Request.Cookies["MySessionId"] == null)
        {
           string sessionId = Guid.NewGuid().ToString();
            Response.SetCookie(new HttpCookie ("MySessionId",sessionId ));
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string sessionId = Request.Cookies["MySessionId"].Value;
        IDictionary <string ,object > session= SessionMgr.GetSession(sessionId );
        session["服务端"] = "333";
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        string sessionId = Request.Cookies["MySessionId"].Value;
        IDictionary<string, object> session = SessionMgr.GetSession(sessionId );
       Button2 .Text  = Convert.ToString(session ["服务端"]);
    }
}