C# task await 等待任务完成

    class Test_1
    {
        int count = 2;
        public async void Function1()
        {
            Console.WriteLine(" Task Start");
            await Task.Delay(1000);
            count += 3;
            Console.WriteLine(" Task End");
        }

        public  void Add()
        {
           Task.Factory.StartNew(Function1).Wait();
           Console.WriteLine(" Console End ,count = " + count);
        }
    }

new Test_1().Add();

//output
 Task Start
 Console End ,count = 2
 Task End

    class Test_1
    {
        int count = 2;
        public async Task Function1()
        {
            Console.WriteLine(" Task Start");
            await Task.Delay(1000);
            count += 3;
            Console.WriteLine(" Task End");
            return count;

        }

        public  void Add()
        {
           Task.Factory.StartNew(Function1).Result.Wait();
           Console.WriteLine(" Console End ,count = " + count);
        }
    }

new Test_1().Add();

//output
 Task Start
 Task End
 Console End ,count = 5