大转盘

public class RandomRed
{
    private static List<award> allaward = new List<award>() { 
                new award(){chance=0.6,money=1},
                new award(){chance=0.1,money=2},
                new award(){chance=0.1,money=3},
                new award(){chance=0.1,money=4},
                new award(){chance=0.1,money=5},
            };
    private static Random Rnd = new Random();
    public static decimal randommoney()
    {
        return (from x in Enumerable.Range(0, 1000000)  //最多支100万次骰子
                let oneaward = allaward[Rnd.Next(allaward.Count())]
                let rand = Rnd.NextDouble() * 100
                where rand < oneaward.chance
                select oneaward).First().money;
    }
    public class award
    {
        public double chance { get; set; }
        public decimal money { get; set; }
    }
}