//这样产生0 ~ 100的强随机数(含100) int max = 100; int rnd = int.MinValue; decimal _base = (decimal)long.MaxValue; byte[] rndSeries = new byte[8]; System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider(); rng.GetBytes(rndSeries); //不含100需去掉+1 rnd = (int)(Math.Abs(BitConverter.ToInt64(rndSeries, 0)) / _base * (max+1)); //这个rnd就是你要的随机数, //但是要注意别扔到循环里去,实例化RNG对象可是很消耗资源的