问替代ConfigureAwait

EN

 public async Task<ListResponse> GetResponseAsync(ListRequest request = null)
        {
            request =  request ?? new ListRequest
            {
                Limit = _limit
            };

            using (var client = CreateMailClient("lists"))
            {
                var response = await client.GetAsync(request.ToQueryString()).ConfigureAwait(false);
                await response.EnsureSuccessMailChimpAsync().ConfigureAwait(false);

                var listResponse = await response.Content.ReadAsAsync<ListResponse>().ConfigureAwait(false);
                return listResponse;
            }
        }