C#生成随机验证码代码分享

                Brush newBrush = new SolidBrush(GetRandomColor());
                Point thePos = new Point(_x, _y);
                g.DrawString(str_char, fonts[Next(fonts.Length - 1)], newBrush, thePos);
            }
            for (int i = 0; i < 10; i++)
            {
                int x = Next(image.Width - 1);
                int y = Next(image.Height - 1);
                image.SetPixel(x, y, Color.FromArgb(Next(0, 255), Next(0, 255), Next(0, 255)));
            }
            image = TwistImage(image, true, Next(1, 3), Next(4, 6));
            g.DrawRectangle(new Pen(Color.LightGray, 1), 0, 0, int_ImageWidth - 1, (letterHeight - 1));
            this.image = image;
        }

        /// <summary>
        /// 字体随机颜色
        /// </summary>
        public Color GetRandomColor()
        {
            Random RandomNum_First = new Random((int)DateTime.Now.Ticks);
            System.Threading.Thread.Sleep(RandomNum_First.Next(50));
            Random RandomNum_Sencond = new Random((int)DateTime.Now.Ticks);
            int int_Red = RandomNum_First.Next(180);
            int int_Green = RandomNum_Sencond.Next(180);
            int int_Blue = (int_Red + int_Green > 300) ? 0 : 400 - int_Red - int_Green;
            int_Blue = (int_Blue > 255) ? 255 : int_Blue;
            return Color.FromArgb(int_Red, int_Green, int_Blue);