public string GetRandomColor() {         Random RandomNum_First = new Random((int)DateTime.Now.Ticks);         //  对于C#的随机数，没什么好说的         System.Threading.Thread.Sleep(RandomNum_First.Next(50));         Random RandomNum_Sencond = new Random((int)DateTime.Now.Ticks);         //  为了在白色背景上显示，尽量生成深色         int int_Red = RandomNum_First.Next(256);         int int_Green = RandomNum_Sencond.Next(256);         int int_Blue = (int_Red + int_Green > 400) ? 0 : 400 - int_Red - int_Green; int_Blue = (int_Blue > 255) ? 255 : int_Blue;      return Color.FromArgb(int_Red, int_Green, int_Blue).Name; }