simple async/await example

gistfile1.txt

Console.WriteLine(DateTime.Now);

//This block takes 1 second to run because all 5 tasks are running simultaneously
{
	var a = Task.Delay(1000);
	var b = Task.Delay(1000);
	var c = Task.Delay(1000);
	var d = Task.Delay(1000);
	var e = Task.Delay(1000);

	await a;
	await b;
	await c;
	await d;
	await e;
}

Console.WriteLine(DateTime.Now);

//This block takes 5 seconds to run because each "await" pauses the program until the task finishes
{
	await Task.Delay(1000);
	await Task.Delay(1000);
	await Task.Delay(1000);
	await Task.Delay(1000);
	await Task.Delay(1000);
}
Console.WriteLine(DateTime.Now);

OUTPUT:
5/24/2017 2:22:50 PM
5/24/2017 2:22:51 PM
5/24/2017 2:22:56 PM