static void Main(string[] args)
{
Resume resume = new Resume("小明");
resume.SetPersonalInfo("男", "21");
resume.SetWorkExperience("2019-2020", "IT公司");
Resume resume1 = (Resume)resume.Clone();
resume1.SetWorkExperience("2019-2021", "IT公司");
resume.Diplay();
resume1.Diplay();
Console.ReadKey();
}