DeserializeObject 时LIST类一直为NULL

我是刚第一次写DeserializeObject，以下问题困扰了一天，以下是我调用接口返回时的处理方式，在将json 转换为Model类的时候，一直转为null ，请问时什么问题，JSON格式不正确吗，哪位能解答一下，谢谢了

  var response = await _httpClient.GetAsync(requestUrl).ConfigureAwait(false);
                string result = await response.Content.ReadAsStringAsync();
                string decodeResult = UnicodeToString(result);
                HttpResponseModel<T> responseModel = new HttpResponseModel<T>(response.StatusCode, decodeResult);
                if (response.StatusCode == HttpStatusCode.OK)
                {
                    responseModel.ResponseModel = JsonConvert.DeserializeObject<T>(decodeResult);
                }

ResponseModel.CS

 public class TestCustomResponseModel
    {

        public string ErrorCode { get; set; }
        public string ErrorMsg { get; set; }

        public TestCustomModel[] List { get; set; }
        public List<TestCustomModel> List1 { get; set; }
     
    }
    public class TestCustomModel
    {

        public string ShootShopId { get; set; }
        public string ShootDate { get; set; }
        public int TQty { get; set; }
        public int ZQty { get; set; }
    }

JSON
{"ErrorCode":0,"ErrorMsg":"","Data":"[{"ShootShopId":"000010","ShootDate":20220604,"bjCanShootQty":25.000000,"zaCanShootQty":-24.000000},{"ShootShopId":"000010","ShootDate":20220605,"bjCanShootQty":24.000000,"zaCanShootQty":-23.000000},{"ShootShopId":"000010","ShootDate":20220606,"bjCanShootQty":24.000000,"zaCanShootQty":-21.000000},{"ShootShopId":"000010","ShootDate":20220607,"bjCanShootQty":24.000000,"zaCanShootQty":-16.000000},{"ShootShopId":"000010","ShootDate":20220608,"bjCanShootQty":26.000000,"zaCanShootQty":-19.000000},{"ShootShopId":"000010","ShootDate":20220609,"bjCanShootQty":24.000000,"zaCanShootQty":-21.000000},{"ShootShopId":"000010","ShootDate":20220610,"bjCanShootQty":24.000000,"zaCanShootQty":-20.000000},{"ShootShopId":"000010","ShootDate":20220611,"bjCanShootQty":24.000000,"zaCanShootQty":-20.000000},{"ShootShopId":"000010","ShootDate":20220612,"bjCanShootQty":24.000000,"zaCanShootQty":-24.000000},{"ShootShopId":"000010","ShootDate":20220613,"bjCanShootQty":25.000000,"zaCanShootQty":-18.000000}]"}

你给出的json文本格式有误

{
    "ErrorCode": 0,
    "ErrorMsg": "",
    "Data": [{
        "ShootShopId": "000010",
        "ShootDate": 20220604,
        "bjCanShootQty": 25.000000,
        "zaCanShootQty": -24.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220605,
        "bjCanShootQty": 24.000000,
        "zaCanShootQty": -23.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220606,
        "bjCanShootQty": 24.000000,
        "zaCanShootQty": -21.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220607,
        "bjCanShootQty": 24.000000,
        "zaCanShootQty": -16.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220608,
        "bjCanShootQty": 26.000000,
        "zaCanShootQty": -19.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220609,
        "bjCanShootQty": 24.000000,
        "zaCanShootQty": -21.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220610,
        "bjCanShootQty": 24.000000,
        "zaCanShootQty": -20.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220611,
        "bjCanShootQty": 24.000000,
        "zaCanShootQty": -20.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220612,
        "bjCanShootQty": 24.000000,
        "zaCanShootQty": -24.000000
    }, {
        "ShootShopId": "000010",
        "ShootDate": 20220613,
        "bjCanShootQty": 25.000000,
        "zaCanShootQty": -18.000000
    }]
}

对应的C#类

// Root myDeserializedClass = JsonSerializer.Deserialize<Root>(myJsonResponse);
    public class Datum
    {
        [JsonPropertyName("ShootShopId")]
        public string ShootShopId { get; set; }

        [JsonPropertyName("ShootDate")]
        public int ShootDate { get; set; }

        [JsonPropertyName("bjCanShootQty")]
        public double BjCanShootQty { get; set; }

        [JsonPropertyName("zaCanShootQty")]
        public double ZaCanShootQty { get; set; }
    }

    public class Root
    {
        [JsonPropertyName("ErrorCode")]
        public int ErrorCode { get; set; }

        [JsonPropertyName("ErrorMsg")]
        public string ErrorMsg { get; set; }

        [JsonPropertyName("Data")]
        public List<Datum> Data { get; set; }
    }

我现在的需求就是能对json中的data进行遍历，进行业务逻辑处理，请问还有什么实现方式吗