实体类的基本应用 List与JSON转换

        public class User
        {
            public int Age { get; set; }
            public string Id { get; set; }
    
            [Display(Name = "姓名")]
            public string Name { get; set; }
    
            public string QQ { get; set; } = "4126488";
        }
    
    
      
      
      
      
      
      
      
      
      
      
    

        private void btnWriteText_Click(object sender, EventArgs e)
        {
            Random