C#最简单的抽奖实现

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Dictionary<string, int> prizes = new Dictionary<string, int>         {             { "香蕉", 1 },             { "苹果", 2 },             { "辣椒", 3 },             { "梨", 4 }         };   string result =""; while (result != null) {     result = Draw(prizes);     Console.WriteLine($"恭喜你抽了个：{result??"寂寞"}"); }   /// 抽奖算法 static string Draw(Dictionary<string, int> prizes) {     int totalWeight = prizes.Values.Sum();     int randomNumber =new Random().Next(totalWeight);     int currentWeight = 0;       foreach (var prize in prizes)     {         currentWeight += prize.Value;         if (randomNumber < currentWeight)         {             prizes[prize.Key]--; // 减少剩余数量             return prize.Key;         }     }       return null; // 如果所有奖品都抽完了，返回null }