如何仅从谷歌 API 获取postal_code数据

我正在尝试从谷歌地理编码 api 获取邮政编码。

仅获取邮政编码。

https://maps.googleapis.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&key=API_KEY

{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "231",
               "short_name" : "231",
               "types" : [ "street_number" ]
            },
            {
               "long_name" : "Millway Avenue",
               "short_name" : "Millway Ave",
               "types" : [ "route" ]
            },
            {
               "long_name" : "Concord",
               "short_name" : "Concord",
               "types" : [ "sublocality_level_1", "sublocality", "political" ]
            },
            {
               "long_name" : "Vaughan",
               "short_name" : "Vaughan",
               "types" : [ "locality", "political" ]
            },
            {
               "long_name" : "York Regional Municipality",
               "short_name" : "York Regional Municipality",
               "types" : [ "administrative_area_level_2", "political" ]
            },
            {
               "long_name" : "Ontario",
               "short_name" : "ON",
               "types" : [ "administrative_area_level_1", "political" ]
            },
            {
               "long_name" : "Canada",
               "short_name" : "CA",
               "types" : [ "country", "political" ]
            },
            {
               "long_name" : "L4K",
               "short_name" : "L4K",
               "types" : [ "postal_code_prefix", "postal_code" ]
            }
         ],
         "formatted_address" : "231 Millway Avenue, Vaughan, ON L4K, Canada",
         "geometry" : {
            "bounds" : {
               "northeast" : {
                  "lat" : 43.7991508,
                  "lng" : -79.5280784
               },
               "southwest" : {
                  "lat" : 43.7991481,
                  "lng" : -79.5280964
               }
            },
            "location" : {
               "lat" : 43.7991481,
               "lng" : -79.5280964
            },
            "location_type" : "RANGE_INTERPOLATED",
            "viewport" : {
               "northeast" : {
                  "lat" : 43.80049843029149,
                  "lng" : -79.52673841970849
               },
               "southwest" : {
                  "lat" : 43.7978004697085,
                  "lng" : -79.5294363802915
               }
            }
         },
         "partial_match" : true,
         "types" : [ "street_address" ]
      }
   ],
   "status" : "OK"
}

请帮助我。

 string _Postcode = (from x in gpr.results[0].address_components.AsQueryable()
                                                where x.types.Contains("postal_code")
                                                select x.long_name).FirstOrDefault();