public string GetRandomColor() 
{ 
Random RandomNum_First = new Random((int)DateTime.Now.Ticks); 
// 對于C#的隨機數，沒什么好說的 
System.Threading.Thread.Sleep(RandomNum_First.Next(50)); 
Random RandomNum_Sencond = new Random((int)DateTime.Now.Ticks); 

// 為了在白色背景上顯示，盡量生成深色 
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; 
}