class Program
    {
        static void Main(string[] args)
        {
            Test();
            Console.ReadKey();
        }
    
        static async void Test()
        {
            Task<int> returnedTaskTResult = GetTaskOfTResultAsync();
            SynchronousTask();
            int intResult = await returnedTaskTResult;
            //int intResult = await GetTaskOfTResultAsync();
            Console.WriteLine("GetTaskOfTResultAsync result " + intResult);
        }
    
        static async Task<int> GetTaskOfTResultAsync()
        {
            int hours = 0;
            Console.WriteLine("GetTaskOfTResultAsync start!");
            await Task.Delay(10000);
            Console.WriteLine("GetTaskOfTResultAsync end!");
    
            return hours;
        }
    
        static void SynchronousTask()
        {
            Console.WriteLine("SynchronousTask start!");
            Thread.Sleep(2000);
            Console.WriteLine("SynchronousTask end!");
        }
    }