/// <summary>
        /// 初始化
        /// </summary>
        private async void InitCategories()
        {
            var tasks = new[] { this._netWorkServices.GetAsync <PlayListCategory[]>("FindMusic", "GetPlayListCategories"),
                                this._netWorkServices.GetAsync <PlayListCategory[]>("FindMusic", "GetHotPlayListCategories") };
            await Task.WhenAll(tasks);

            if (tasks.All(x => x.Result.Successed))
            {
                await Task.WhenAll(AllCategories.AddRangeAsync(tasks[0].Result.Data), HotCategories.AddRangeAsync(tasks[1].Result.Data));
            }
            else
            {
                //todo 网络提示信息
            }
        }