c# - Webリクエストを介してasp.netでラップされたjson配列を逆シリアル化する方法は?

Question

{"lstCitiesResult":[{"city_id":"21","city_name":"Trichy"},  
                    {"city_id":"22","city_name":"Chennai"},
                    {"city_id":"24","city_name":"Mumbai"},  
                    {"city_id":"25","city_name":"Hyderabad"}] }