static double[] GetRandomMoney(double money, int n)
 {
  double[] array = new double[n];
  RedPackage red = new RedPackage() { money = money, count = n };
  for (int i = 0; i < n; i++)
  {
   array[i] = GetRandomMoney(red);
  }
  return array;
 }
 /// <summary>
 /// 即開即中，考慮機會均等，減少金額差較大的幾率
 /// 隨機產(chǎn)生，額度在0.01和剩余平均值*2之間
 /// </summary>
 /// <returns></returns>
 static double GetRandomMoney(RedPackage redPackage)
 {
  //如果最后一個，返回全部
  if (redPackage.count == 1)
  {
   redPackage.count--;
   return Math.Round(redPackage.money * 100) / 100.00;
  }
  //隨機生成
  Random ran = new Random();
  double min = 0.01;
  double max = redPackage.money / redPackage.count * 2;
  double money = ran.NextDouble() * max;
 
  money = money <= min ? 0.01 : money;
  money = Convert.ToInt32(money * 100) / 100.00;
  redPackage.count--;
  redPackage.money -= money;
  return money;
 }
 public class RedPackage
 {
  /// <summary>
  /// 剩余紅包數(shù)量
  /// </summary>
  public int count;
  /// <summary>
  /// 剩余金額
  /// </summary>
  public double money;
 }

/// <summary>
/// 一次性拆分紅包，不考慮機會平等性
/// 最小單位1 分
/// </summary>
 static double[] DiviedOne(double money, int n)
 {
 
  double min = 0.01;
  if (money < min)
   throw new Exception("拆分金額不能小于0.01 ");
  int fen = (int)money * 100;
  //創(chuàng)建n 個紅包數(shù)組
  int[] array = new int[n];
  //每個紅包先填充1分
  Array.Fill(array, 1);
  fen -= n;
 
  //第二步，隨機分配
  Random ran = new Random();
  int i = 0;
  while (fen > 1)
  {
   int f = ran.Next(fen);
   array[i % n] += f;
   fen -= f;
   i++;
  }
  //最后一分錢，補到第一個數(shù)組
  if (fen > 0)
  {
   array[0] += fen;
  }
 
  return array.Select(q => q / 100.0).ToArray();
 }