Issue regarding asynchronous Programming with Async and Await c# [duplicate]

Answer 1

You need to put async in your method, I modified your code since the Click event signature does not return int, and your method AccessTheWebAsync does, so I moved it to another method async that returns int, anyway I async and await are kind of syntactic sugar and is recommended that you take a look at what really happens to your code when you use these keywords, take a look here: http://www.codeproject.com/Articles/535635/Async-Await-and-the-Generated-StateMachine

private async void button1_Click(object sender, EventArgs e)
        {
            await ClickAsync();
        }

        private async Task AccessTheWebAsync()
        {

            return await Task.Run(() =>
                {
                    Task.Delay(10000);  //Some heavy work here
                    return 3; //replace with real result
                });

        }

        public async Task ClickAsync()
        {
            int contentLength = await AccessTheWebAsync();

            label1.Text = String.Format("\r\nLength of the downloaded string: {0}.\r\n", contentLength);
        }
    }