/// <summary>
/// Post请求JSON
/// </summary>
/// <param name="httpClient">http客户端</param>
/// <param name="url">URL</param>
/// <param name="data">数据</param>
/// <param name="customerOptions">自定义选项配置</param>
/// <returns>任务</returns>
public static Task <string> PostJsonAsync(this HttpClient httpClient, string url, object data = null, Action <ChannelCustomerOptions> customerOptions = null)
{
return(Task <string> .Run(() => httpClient.PostJson(url, data, customerOptions)));
}