public System.Drawing.Color GetRandomColor()

    {

        Random RandomNum_First = new Random(Guid.NewGuid().GetHashCode());

        Random RandomNum_Sencond = new Random(Guid.NewGuid().GetHashCode());

        //为了在白色背景上显示，尽量生成深色

        int int_Red = RandomNum_First.Next();

        int int_Green = RandomNum_Sencond.Next();

        int int_Blue = (int_Red + int_Green > ) ?  :  - int_Red - int_Green;

        int_Blue = (int_Blue > ) ?  : int_Blue;

        return System.Drawing.Color.FromArgb(int_Red, int_Green, int_Blue);

    }

public static string GetPageName()

    {

        string strRand = String.Empty;

        System.Random random = new Random(Guid.NewGuid().GetHashCode());

        string str = "qwertyuiopasdfghjklmnbvcxz";

        for (int i = ; i < ; i++)

        {

            strRand += str[random.Next(, )].ToString();

        }

        return strRand;

    }