C#遍历类的所有属性，遍历list集合的所有属性

                student aa= new student();
                Type type = 标题.GetType();
                PropertyInfo[] propertyInfos = type.GetProperties();  
                List<string> heads = new List<string>();
                foreach (var item in propertyInfos)
                { 
                    heads.Add(item.Name);//将属性添加到集合里
                }


public  class student{
    public string id{get;set;}
    public string name{get;set;}
    public string sex{get;set;}
    public string age{get;set;}


}