。包含自定义类对象列表的（）

您需要实现

IEquatable

Equals()

GetHashCode()

例如：

public class CartProduct : IEquatable<CartProduct>{    public Int32 ID;    public String Name;    public Int32 Number;    public Decimal CurrentPrice;    public CartProduct(Int32 ID, String Name, Int32 Number, Decimal CurrentPrice)    {        this.ID = ID;        this.Name = Name;        this.Number = Number;        this.CurrentPrice = CurrentPrice;    }    public String ToString()    {        return Name;    }    public bool Equals( CartProduct other )    {        // Would still want to check for null etc. first.        return this.ID == other.ID &&     this.Name == other.Name &&     this.Number == other.Number &&     this.CurrentPrice == other.CurrentPrice;    }}