重写函数的Equals方法，来确定需要比较类是否相同的条件

RecipientInfo.cs

 

 1using System;
 2using System.Collections.Generic;
 3using System.Text;
 4
 5namespace ConsoleApplication1
 6{
 7    public class RecipientInfo
 8    {
 9        //收件人的类，包含邮件地址和收件人的姓名
        private string mailAddress;
        private string name;

        public RecipientInfo(string mailAddress, string name)
        {
            this.mailAddress = mailAddress;
            this.name = name;
        }

        public string MailAddress
        {
            get { return mailAddress; }
            set { mailAddress = value; }
        }

        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        public override bool Equals(object obj)
        {
            if (obj == null)
            {
                return false;
            }

            if (obj.GetType() == typeof(RecipientInfo))
            {
                if (this.Name.Trim() == ((RecipientInfo)obj).Name.Trim() && this.MailAddress.Trim() == ((RecipientInfo)obj).MailAddress.Trim())
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            else
            {
                return false;
            }
        }
    }
}

 

调用页面：

 

 1List<RecipientInfo> list = new List<RecipientInfo>();
 2
 3            RecipientInfo info1 = new RecipientInfo("[email protected]", "name1");
 4            RecipientInfo info2 = new RecipientInfo("[email protected]", "name2");
 5            RecipientInfo info3 = new RecipientInfo("[email protected]", "name1");
 6
 7            list.Add(info1);
 8            list.Add(info2);
 9
            if (list.Contains(info3))
            {
                Console.WriteLine("included");
            }

 

输出结果，included