当JSON字符串的值为.000Z时，如何使用C#反序列化JSON字符串而无需修剪几分之一秒？

前

反序列化后，“开始日期”的值变为“2020-06-18T05:00:00Z”。根据我的要求，一秒的分数（.000）的值不应修剪

JsonString =
{
    "account":
    {
        "Email": "test@gmail.com",
        "holdername": { "firstName": "John", "lastName": "Smith" }
    },
    "offer": {
        "offerDetail":
        {
            "offerId": "enterprise_marketplace",
            "name": "enterprise_marketplace",
            "startDate": "2020 - 06 - 18T05: 00: 00.001Z",
            "endDate": "2021 - 06 - 18T05: 00: 00.002Z"
        },
        "accountId": "88EED4465",
        "openingDate": "2020 - 06 - 18T05: 00: 00.000Z"
        , "total": "5"
    }
} 

var jObj = (JObject)JsonConvert.DeserializeObject(JsonString);