List Dictionary 判断相等（根据value中的字段或属性来判断）

List 或 Dictionary值如果是类对象，那么要在类中实现IEquatable相关接口

public class Seat : IEquatable<Seat>
    {
        #region Field

        #endregion

        #region Property

        /// <summary>
        /// 名称
        /// </summary>
        public string Name { get; set; }

        /// <summary>
        /// IP地址
        /// </summary>
        public IPAddress IpAddr { get; set; }

        /// <summary>
        /// 座位ID
        /// </summary>
        public int ID { get; set; }

        /// <summary>
        /// 是否在线
        /// </summary>
        public bool IsOnline { get; set; }

        #endregion

        #region Constructor

        /// <summary>
        /// 
        /// </summary>
        /// <param name="IpAddr"></param>
        /// <param name="SeatName"></param>
        public Seat()
        {
            this.IpAddr = IPAddress.Parse("127.0.0.1");
            this.Name = "未定义";
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="IpAddr"></param>
        /// <param name="SeatName"></param>
        public Seat(IPAddress IpAddr, string SeatName)
        {
            this.IpAddr = IpAddr;
            this.Name = SeatName;
        }

        #endregion

        #region IEquatable

        /// <summary>
        /// 
        /// </summary>
        /// <param name="other"></param>
        /// <returns></returns>
        public bool Equals(Seat other)
        {
            if (other == null)
                return false;

            if (this.Name == other.Name)
                return true;
            else
                return false;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public override bool Equals(Object obj)
        {
            if (obj == null)
                return false;

            if (obj as Seat == null)
                return false;
            else
                return Equals(obj as Seat);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public override int GetHashCode()
        {
            return this.Name.GetHashCode();
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="client1"></param>
        /// <param name="client2"></param>
        /// <returns></returns>
        public static bool operator ==(Seat client1, Seat client2)
        {
            if (((object)client1) == null || ((object)client2) == null)
                return Object.Equals(client1, client2);

            return client1.Equals(client2);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="client1"></param>
        /// <param name="client2"></param>
        /// <returns></returns>
        public static bool operator !=(Seat client1, Seat client2)
        {
            if (((object)client1) == null || ((object)client2) == null)
                return !Object.Equals(client1, client2);

            return !(client1.Equals(client2));
        }

        #endregion

    }