Csharp C#ASP.NET Core 6：将奇怪的 json 转换为有用的东西

我从Web请求中获得了一个JSON:

var client = new HttpClient();
var json = await client.GetFromJsonAsync<dynamic>(url);

我得到的JSON如下所示(我无法控制它，因此无法更改它):

{
    "1": {
        "2023-03-10": [
            {
                "label": "AAA",
                "prop1": 123,
                "prop2": 456,
            },
            {
                "label": "BBB",
                "prop1": 123,
                "prop2": 456,
            },
            {
                "label": "CCC",
                "prop1": 123,
                "prop2": 456,
            }
        ],
        "2023-03-11": [
            {
                "label": "CCC",
                "prop1": 123,
                "prop2": 456,
            },
            {
                "label": "DDD",
                "prop1": 123,
                "prop2": 456,
            }
        ]
    },
    "2": {
        "2023-03-10": [...],
        "2023-03-11": [...]
    },
   ...
   ...
}

请注意，"1"、"2"和日期是一个数组中的100个元素.

我怎么才能用这个工作呢？

我能以某种方式在它上面循环吗？

foreach(var item in json?.somethingGetAllProperties()?)
{
    var id = item?.what?
}

或者我能把它转换成我能用的东西吗？

var client = new HttpClient();
var json = await client.GetFromJsonAsync<MyObject>(url, new JsonSerializerOptions(){ ?what? });

[?SomethingHere?]
class MyObject
{
    [?OrHere?]
    public int Id { get; set; }
    public List<Foo> Foo { get; set; }
}

class Foo
{
    public DateTime Date { get; set; }
    public List<Baa> Baa{ get; set; }
}

class Baa 
{
    public string label{ get; set; }
    public int prop1 { get; set; }
    public int prop2 { get; set; }
}

我以前只使用过简单的json转换.比如将属性的名称更改为新的名称.