public static void Main()
var clothingPricesDict = new System.Collections.Generic.Dictionary<string, decimal>();
clothingPricesDict.Add("BlueShirt", 25.99M);
clothingPricesDict.Add("RedShoes", 42.99M);
var price = clothingPricesDict["RedShoes"];
Console.WriteLine($"Red shoes are ${price} each");
var clothingPricesSet = new System.Collections.Generic.HashSet<decimal>();
clothingPricesSet.Add(25.99M);
clothingPricesSet.Add(42.99M);