应用程序 数据缓存

 /// <summary>
    ///  通过单利模式 实现数据程序缓存
    ///  DataInstanct.GetInstan().Add(0)[写入数据]
    ///   DataInstanct.GetInstan().Clear()[清空数据存储]
    /// </summary>
    public class DataInstance
    {   
        /// <summary>
        /// 数据仓库
        /// </summary>
        public static List<int> dataWarehouse = new List<int>();
        private readonly static DataInstanct instan = new DataInstanct();
       
        private static object obj=new object ();
        
        public static DataInstanct GetInstan()
        {
            return instan;
        }

        public DataInstanct()
        {
        }

        public void Clear()
        {
            dataWarehouse = new List<int>();
        }
 
        public int Add(int i)
        {
            lock (obj)
            {
                list.Add(i);
            }
            return list.Count;
        }
    }