public class CDnInfo : IEquatable<CDnInfo >
    {
        public int iRank;
        public string strDn;
        public string strKeyword;
        public string strOwner;
        public string strIncrease;
        public string strDate;
        public string strFlag;
        
        public static int getMemCount()
        {
            return 10;
        }
        
        public bool Equals(CDnInfo y)
        {
            if (this == null || y == null) return false;
            return this.strDn== y.strDn;
        }
        
    }