求把string中数据以数组形式取出来

string str={"returnCode":200,"message":"成功","data":[{"Code":"110000","Name":"北京市"},{"Code":"120000","Name":"天津市"},{"Code":"130000","Name":"河北省"},{"Code":"140000","Name":"山西省"},{"Code":"150000","Name":"内蒙古"},{"Code":"210000","Name":"辽宁省"},{"Code":"220000","Name":"吉林省"},{"Code":"230000","Name":"黑龙江"},{"Code":"310000","Name":"上海市"},{"Code":"320000","Name":"江苏省"},{"Code":"330000","Name":"浙江省"},{"Code":"340000","Name":"安徽省"},{"Code":"350000","Name":"福建省"},{"Code":"360000","Name":"江西省"},{"Code":"370000","Name":"山东省"},{"Code":"410000","Name":"河南省"},{"Code":"420000","Name":"湖北省"},{"Code":"430000","Name":"湖南省"},{"Code":"440000","Name":"广东省"},{"Code":"450000","Name":"广西"},{"Code":"460000","Name":"海南省"},{"Code":"500000","Name":"重庆市"},{"Code":"510000","Name":"四川省"},{"Code":"520000","Name":"贵州省"},{"Code":"530000","Name":"云南省"},{"Code":"540000","Name":"西藏"},{"Code":"610000","Name":"陕西省"},{"Code":"620000","Name":"甘肃省"},{"Code":"630000","Name":"青海省"},{"Code":"640000","Name":"宁夏"},{"Code":"650000","Name":"新疆"},{"Code":"710000","Name":"台湾省"},{"Code":"810000","Name":"香港"},{"Code":"820000","Name":"澳门"}]}; string str={"returnCode":200,"message":"成功","da