// PROJECT-EXAMPLE
var counts = new System.Collections.Generic.List<int> { 2, 3 };
counts.Add(4);
System.Console.WriteLine(counts.Count);

var visited = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
visited.Add("backpack");
visited.Add("BACKPACK");
UO.Print($"Unique names: {visited.Count}");

var delays = new Dictionary<string, int>
{
    ["short"] = 100,
    ["long"] = 500
};
if (delays.TryGetValue("short", out int delay))
{
    await WaitAsync(delay);
}
var queue = new Queue<string>();
queue.Enqueue("first");
queue.Enqueue("second");
UO.Print(queue.Dequeue());