使用Timer组件_实现定时更改窗体颜色

 1         private void timer1_Tick(object sender, EventArgs e)
 2         {　　//随机变色代码
 3             Random rand = new Random();
 4             int i = rand.Next();
 5             i = i % 6;
 6             switch (i) { 
 7                 case 0:
 8                 case 1:
 9                     BackColor=Color.Red;
10                     break;
11                 case 2:
12                 case 3:
13                     BackColor=Color.Yellow;
14                     break;
15                 case 4:
16                 case 5:
17                     BackColor = Color.Green;
18                     break;
19              }
20         }