股票板块指数算法代码 C#

代码如下请高手告诉更好的算法优级,总感到太费时如何优化，　　　

/// <summary>
    /// 统计算法
    /// </summary>
    public class Statistics
    {
        private List<Plate> _Plates=new List<Plate>();   //板块表
        private Dictionary<string,Item> NewData=new Dictionary<string, Item>(); //最新记录
        private Dictionary<string, PlateM> _PlateMs = new Dictionary<string, PlateM>();  //板块指数

        /// <summary>
        /// 数据进入
        /// </summary>
        /// <param name="mItem"></param>
        public void PostData(Item mItem)
        {
            //判断数据是否变化
            if (!NewData.ContainsKey(mItem.Code))
            {
                NewData.Add(mItem.Code,mItem);
                RefPlateM();
                return;
            }
            if (NewData[mItem.Code].Val != mItem.Val)
            {
                NewData[mItem.Code] = mItem;
                RefPlateM();
            }
        }

        /// <summary>
        /// 更新板块数据
        /// </summary>
        public void RefPlateM()
        {
            double dPM = 0;
            PlateM　m=new PlateM();
            foreach (Plate plate in _Plates)
            {
                m = new PlateM();
                m.Name = plate.Name;

                dPM = 0;
                foreach (string code in plate.Codes)
                {
                    dPM += NewData[code].Val;
                }
                m.Val = dPM;
                m.DateTime = DateTime.Now;

                if (!_PlateMs.ContainsKey(plate.Name))
                {
                    _PlateMs.Add(plate.Name,m);
                    continue;
                }
                if (_PlateMs[plate.Name].Val != dPM)
                    _PlateMs[plate.Name] = m;
            }
        }
    }

    public struct Item
    {
        public string Code;  //代码
        public double Val;   //值
        public DateTime @DateTime;  //日期，时间
    }

    /// <summary>
    /// 板块
    /// </summary>
    public struct Plate
    {
        public string Name;  //板块名
        public List<string> Codes;  //代码表
    }

    /// <summary>
    /// 板块指数
    /// </summary>
    public struct PlateM
    {
        public string Name;  //板块名
        public double Val;   //值
        public DateTime @DateTime;  //日期，时间
    }

C# 股票算法优化指数 --------------------编程问答-------------------- 求解！！！！！！！！ --------------------编程问答-------------------- 求解！！！！！！！！

补充：.NET技术 ,  C#