long tick = DateTime.Now.Ticks;
Random ran = new Random((int)(tick & 0xffffffffL) | (int) (tick >> 32)); int code=ran.Next(1000, 9999);本文共 187 字，大约阅读时间需要 1 分钟。
long tick = DateTime.Now.Ticks;
Random ran = new Random((int)(tick & 0xffffffffL) | (int) (tick >> 32)); int code=ran.Next(1000, 9999);转载于:https://www.cnblogs.com/zwei1121/p/4578472.html