C# 对象引用未设置为对象的实例（Google Geo Fenging API）

在使用地址时，我试图从谷歌地理围栏API获取纬度和经度。我希望以JSON格式获得结果，并使用其中的纬度和经度。当我转到我试图从中获取信息的链接时，我通过粘贴JSON格式的special创建了类

我的问题是，当我访问类以获取纬度和经度时，它会抛出一个异常，即“对象引用未设置为对象的实例”和“Speech_Recognition.GoogleGeoCodeResponse.geometry.get returned null”

以下是与其关联的代码：

var url = "https://maps.google.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA";
var result = new System.Net.WebClient().DownloadString(url);
GoogleGeoCodeResponse googleResponse = JsonConvert.DeserializeObject<GoogleGeoCodeResponse>(result);



request = new ForecastIORequest("***Removed API KEY***", float.Parse(googleResponse.geometry.location.lat), float.Parse(googleResponse.geometry.location.lng), DateTime.Now, Unit.us); // Error is thrown here 
var response = request.Get();

以下是结果的内容：

{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "Google Building 41",
           "short_name" : "Google Bldg 41",
           "types" : [ "premise" ]
        },
        {
           "long_name" : "1600",
           "short_name" : "1600",
           "types" : [ "street_number" ]
        },
        {
           "long_name" : "Amphitheatre Parkway",
           "short_name" : "Amphitheatre Pkwy",
           "types" : [ "route" ]
        },
        {
           "long_name" : "Mountain View",
           "short_name" : "Mountain View",
           "types" : [ "locality", "political" ]
        },
        {
           "long_name" : "Santa Clara County",
           "short_name" : "Santa Clara County",
           "types" : [ "administrative_area_level_2", "political" ]
        },
        {
           "long_name" : "California",
           "short_name" : "CA",
           "types" : [ "administrative_area_level_1", "political" ]
        },
        {
           "long_name" : "United States",
           "short_name" : "US",
           "types" : [ "country", "political" ]
        },
        {
           "long_name" : "94043",
           "short_name" : "94043",
           "types" : [ "postal_code" ]
        }
     ],
     "formatted_address" : "Google Bldg 41, 1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA",
     "geometry" : {
        "bounds" : {
           "northeast" : {
              "lat" : 37.4228642,
              "lng" : -122.0851557
           },
           "southwest" : {
              "lat" : 37.4221145,
              "lng" : -122.0859841
           }
        },
        "location" : {
           "lat" : 37.4224082,
           "lng" : -122.0856086
        },
        "location_type" : "ROOFTOP",
        "viewport" : {
           "northeast" : {
              "lat" : 37.4238383302915,
              "lng" : -122.0842209197085
           },
           "southwest" : {
              "lat" : 37.4211403697085,
              "lng" : -122.0869188802915
           }
        }
     },
     "place_id" : "ChIJxQvW8wK6j4AR3ukttGy3w2s",
     "types" : [ "premise" ]
  }
   ],
   "status" : "OK"
}

---

为什么要抛出这个空异常？如何修复此问题？

几何体的

属性位于
结果的内部，因此我将其更改为：
结果googleResponse=JsonConvert.DeserializeObject（结果）；请求=新的预测请求（“ea3015a917dba9f4f679aa189febff24”，googleResponse.geometry.location.lat，googleResponse.geometry.location.lng，DateTime.Now，Unit.us）并得到相同的错误。
{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "Google Building 41",
           "short_name" : "Google Bldg 41",
           "types" : [ "premise" ]
        },
        {
           "long_name" : "1600",
           "short_name" : "1600",
           "types" : [ "street_number" ]
        },
        {
           "long_name" : "Amphitheatre Parkway",
           "short_name" : "Amphitheatre Pkwy",
           "types" : [ "route" ]
        },
        {
           "long_name" : "Mountain View",
           "short_name" : "Mountain View",
           "types" : [ "locality", "political" ]
        },
        {
           "long_name" : "Santa Clara County",
           "short_name" : "Santa Clara County",
           "types" : [ "administrative_area_level_2", "political" ]
        },
        {
           "long_name" : "California",
           "short_name" : "CA",
           "types" : [ "administrative_area_level_1", "political" ]
        },
        {
           "long_name" : "United States",
           "short_name" : "US",
           "types" : [ "country", "political" ]
        },
        {
           "long_name" : "94043",
           "short_name" : "94043",
           "types" : [ "postal_code" ]
        }
     ],
     "formatted_address" : "Google Bldg 41, 1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA",
     "geometry" : {
        "bounds" : {
           "northeast" : {
              "lat" : 37.4228642,
              "lng" : -122.0851557
           },
           "southwest" : {
              "lat" : 37.4221145,
              "lng" : -122.0859841
           }
        },
        "location" : {
           "lat" : 37.4224082,
           "lng" : -122.0856086
        },
        "location_type" : "ROOFTOP",
        "viewport" : {
           "northeast" : {
              "lat" : 37.4238383302915,
              "lng" : -122.0842209197085
           },
           "southwest" : {
              "lat" : 37.4211403697085,
              "lng" : -122.0869188802915
           }
        }
     },
     "place_id" : "ChIJxQvW8wK6j4AR3ukttGy3w2s",
     "types" : [ "premise" ]
  }
   ],
   "status" : "OK"
}