产生五位随机数

public static class Sys
{
    // Fields
    private static Random randObj = new Random();

    // Methods
    public static int Random()
    {
        int num = Environment.TickCount + randObj.Next();
        return (((num = (num * 0x343fd) + 0x269ec3) >> 0x10) & 0x7fff);
    }
}