AwaitMultiple.cs

public async Task AwaitMultiple()
{
    var t1 = Task.Run(() => Console.WriteLine());
    var t2 = Task.Run(() => Console.WriteLine());
    var t3 = Task.Run(() => Console.WriteLine());
    var t4 = Task.Run(() => Console.WriteLine());

    await t1;
    await t2;
    await t3;
    await t4;

    //vs

    await Task.WhenAll(t1, t2, t3, t4);
}