public static async Task Test4()
        {
            Stopwatch watch2 = new Stopwatch();

            watch2.Start();
            ContentManagement service2 = new ContentManagement();
            await service2.InitContentAsync();

            await service2.InitCountAsync();

            watch2.Stop();


            Console.WriteLine(watch2.ElapsedMilliseconds + "  Test4");
        }
        public static async Task Test2()
        {
            Stopwatch watch2 = new Stopwatch();

            watch2.Start();
            ContentManagement service2 = new ContentManagement();
            var contentTask            = await service2.GetContentAsync();

            var countTask = await service2.GetCountAsync();

            var nameTask = await service2.GetNameAsync();


            watch2.Stop();


            Console.WriteLine(watch2.ElapsedMilliseconds);
        }