//声名一个数据集合         var listString = new List<string>() { "a", "b", "c" };         //session key         string key = "sekey";          //获取实例         var sessionManager = SessionManager<List<string>>.GetInstance();          //添加session         sessionManager.Add(key, listString);         //add有其它重载 上面是最基本的          //获取         List<string> sessionList = sessionManager[key];          //其它方法         sessionManager.ContainsKey(key);          sessionManager.Remove(key);//删除          sessionManager.RemoveAll(c => c.Contains("sales_"));//删除key包含sales_的session          sessionManager.GetAllKey();//获取所有key

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web; namespace SyntacticSugar{    /// <summary>    /// ** 描述：session操作类    /// ** 创始时间：2015-6-9    /// ** 修改时间：-    /// ** 作者：sunkaixuan    /// ** 使用说明：    /// </summary>    /// <typeparam name="K">键</typeparam>    /// <typeparam name="V">值</typeparam>    public class SessionManager<V> : IHttpStorageObject<V>    {        private static readonly object _instancelock = new object();        private static SessionManager<V> _instance = null;         public static SessionManager<V> GetInstance()        {            if (_instance == null)            {                lock (_instancelock)                {                    if (_instance == null)                    {                        _instance = new SessionManager<V>();                    }                }             }            return _instance;        }         public override void Add(string key, V value)        {            context.Session.Add(key, value);        }         public override bool ContainsKey(string key)        {            return context.Session[key] != null;        }         public override V Get(string key)        {            return (V)context.Session[key];        }         public override IEnumerable<string> GetAllKey()        {            foreach (var key in context.Session.Keys)            {                yield return key.ToString();            }        }         public override void Remove(string key)        {            context.Session[key] = null;            context.Session.Remove(key);        }         public override void RemoveAll()        {            foreach (var key in GetAllKey())            {                Remove(key);            }        }         public override void RemoveAll(Func<string, bool> removeExpression)        {            var allKeyList = GetAllKey().ToList();            var removeKeyList = allKeyList.Where(removeExpression).ToList();            foreach (var key in removeKeyList)            {                Remove(key);            }        }         public override V this[string key]        {            get { return (V)context.Session[key]; }        }    }}

using System;namespace SyntacticSugar{    public abstract class IHttpStorageObject<V>    {         public int Minutes = 60;        public int Hour = 60 * 60;        public int Day = 60 * 60 * 24;        public System.Web.HttpContext context = System.Web.HttpContext.Current;        public abstract void Add(string key, V value);        public abstract bool ContainsKey(string key);        public abstract V Get(string key);        public abstract global::System.Collections.Generic.IEnumerable<string> GetAllKey();        public abstract void Remove(string key);        public abstract void RemoveAll();        public abstract void RemoveAll(Func<string, bool> removeExpression);        public abstract V this[string key] { get; }    }}