一个递归方法写法,求助
有这么一个对象,拥有众多属性,比如这个对象是Person拥有 姓名,年龄和一个List<Person>属性,现在要用将这样的一个对象集合写成一个Json,我老早就看到这歌问题,至今没写好,求帮助了呗.最后的结果,List<Person>作为Json的一个子节点存在如:

C# code

[    { name: '子集合不为空的', children: [        { name : '节点1.1' },        { name: '节点1.2' },        { name: '节点1.3', children: [                { name: '节点1.3.1' ,children: [                    { name: '节点1.3.1.1' },                    { name: '节点1.3.1.2' }]                },                { name: '节点1.3.2' }        ]        },        { name: '节点1.4' }        ]    },    { name: '子集合为空的' },    { name: '子集合为空的' },    { name: '子集合为空的' }]

C# code

class Person{    public string name;    public int age;    public List<Person> children;    public override string ToString()    {        StringBuilder builder = new StringBuilder(100);        builder.Append("{ ");        builder.Append("\"name\": \"");        builder.Append(this.name);        builder.Append("\", \"age\": \"");        builder.Append(this.age);        builder.Append("\"");        if (this.children != null)        {            builder.Append(", \"children\": ");            builder.Append(ListToStr(this.children));        }        builder.Append(" }");        return builder.ToString();    }    public static string ListToStr(List<Person> children)    {        StringBuilder builder = new StringBuilder(100);        builder.Append("[");        foreach (var item in children)        {            builder.Append(" ");            builder.Append(item.ToString());            builder.Append(",");        }        builder.Remove(builder.Length - 1, 1);        builder.Append(" ]");        return builder.ToString();    }}//调用Person per = ...string str = per.ToString();List<Person> list = ...string strlist = Person.ListToStr(list);