// PROJECT-EXAMPLE
System.Collections.Generic.IEnumerable<int> Numbers()
{
    yield return 1;
    yield return 2;
}
foreach (int value in Numbers()) System.Console.WriteLine(value);

IEnumerable<int> Range(int count)
{
    for (int i = 0; i < count; i++) yield return i;
}
foreach (int value in Range(3))
{
    UO.Print(value.ToString());
}

async IAsyncEnumerable<int> Ticks()
{
    for (int i = 0; i < 3; i++)
    {
        await WaitAsync(10);
        yield return i;
    }
}
await foreach (int tick in Ticks())
{
    UO.Print($"Tick={tick}");
}