高并发下的Id生成器

考虑到sql server以及c#，最多只能用decimal类型，也就是29位的数字，做了下面这个数字型id生成器：

class Program
    {
        static void Main(string[] args)
        {
            int i = ;
            Timing t = new Timing();

            t.Start();
            while(i-->)
                UniqueIdGenerator.Next();
            t.Stop();

            t.Display("");
        }

    }

    public static class UniqueIdGeneratorHelper
    {
        public static long IP2Long(String strIP)
        {
            long[] ip = new long[];
            string[] s = strIP.Split('.');
            ip[] = long.Parse(s[]);
            ip[] = long.Parse(s[]);
            ip[] = long.Parse(s[]);
            ip[] = long.Parse(s[]);
            return (ip[] << ) + (ip[] << ) + (ip[] << ) + ip[];
        }
    }

    public static class UniqueIdGenerator
    {
        static UniqueIdGenerator()
        {
            ip = UniqueIdGeneratorHelper.IP2Long("192.168.1.21");//需要自己从配置文件中读取
        }

        private static long ip=;
        public static decimal Next()
        {
            return decimal.Parse(DateTime.Now.ToString("yyyyMMddHHmmssff") + ip.ToString() + GetSequence().ToString());
        }

        private static int curSeq = ;
        private static object o = ;
        private static int GetSequence()
        {
            lock (o)
            {
                if (curSeq > )
                    curSeq = ;
                return curSeq++;
            }
        }
    }

十万次请求，花了半秒不到，应该还行。