C#随机颜色和随机字母

//随机获取颜色

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);
    }

//随机字母

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;
    }