public static async Task MyTaskAsync()
{
	var first = Task.Run(() =>
	{
		Thread.Sleep(2000);
	});
	var second = Task.Run(() =>
	{
		Thread.Sleep(2000);
	});
	var third = Task.Run(() =>
	{
		Thread.Sleep(2000);
	});

	await Task.WhenAll(first, second, third);
}