C# Task await 예제.

        private async void button2_Click(object sender, EventArgs e)
        {
            try
            {
                await Async_Task_Await_Test();
            }
            catch (Exception ex)
            {
                //throw ex;
                MessageBox.Show(ex.Message);
            }
        }

        private Task Async_Task_Await_Test()
        {

            Action action = () =>
            {
                for (int i = 0; i < 10; i++)
                {
                    Thread.Sleep(500);

                    if (i == 2)
                    {
                        throw new Exception("Error Message!");
                    }
                }
            };

            return Task.Factory.StartNew(action);
        }