如果你只想要
一个随机颜色的实心画笔,你可以试试这个:
Random r = new Random();
int red = r.Next(0,byte.MaxValue + 1);
int green = r.Next(0,byte.MaxValue + 1);
int blue = r.Next(0,byte.MaxValue + 1);
System.Drawing.Brush brush = new System.Drawing.solidBrush(Color.FromArgb(red,green,blue));