一个窗口淡出的问题，望解答！

Question

定时器
private void Form1_Load(object sender, System.EventArgs e)
{
this.timer1.Enabled=true;
this.Opacity=0;
}

Answer 1

private void timer1_Tick(object sender, System.EventArgs e)
{
if(this.Opacity<1)
{
this.Opacity=this.Opacity+0.3;
}
else
{
this.timer1.Enabled=false;
}
} private void Form1_Load(object sender, System.EventArgs e)
{
this.timer1.Enabled=true;
this.Opacity=0;
} private void button1_Click(object sender, System.EventArgs e)
{
if(this.Opacity==100)
{
this.Opacity=this.Opacity-0.3;
}
if(this.Opacity==0)
{
Application.Exit();
}
}
================>private void timer1_Tick(object sender, System.EventArgs e)
{
If (this.Opacity == 0 )
                              Timer1.Enabled = False;
                              Application.Exit();
                           Else
                              this.Opacity = this.Opacity - 0.2;
             } private void Form1_Load(object sender, System.EventArgs e)
{
this.timer1.Enabled=false;
this.Opacity=0;
} private void button1_Click(object sender, System.EventArgs e)
{
this.timer1.Enabled=true;
}

Answer 2

private double opacityIncrement = 0.1;
private const int changeInterval = 25;
private Timer timer1; //表单载入
private void Form1_Load(object sender, System.EventArgs e)
{ timer1=new Timer();
timer1.Interval=changeInterval;
timer1.Tick+=new System.EventHandler(this.timer1_Tick);
this.Opacity=0;
timer1.Start();
} //渐显事件
private void timer1_Tick(object sender, System.EventArgs e)
{
          this.timer1.Stop();
if(this.Opacity<1)
{
this.Opacity=this.Opacity+this.changeInterval;
}
else
{
this.timer1.Enabled=false;
}
        this.timer1.Start();
        }

Answer 3

完整的解决方法：
使用两个定时器，一个在窗体运行时淡入，一个在点击确定后淡出并结束运行
[STAThread]
static void Main() 
{
Application.Run(new Form1());
} private void timer1_Tick(object sender, System.EventArgs e)
{
if(this.Opacity<1)
{
this.Opacity=this.Opacity+0.3;
}
else
{
this.timer1.Enabled=false;
}
} private void Form1_Load(object sender, System.EventArgs e)
{
this.timer1.Enabled=true;
this.Opacity=0;
} private void button1_Click(object sender, System.EventArgs e)
{
this.timer2.Start();
} private void timer2_Tick(object sender, System.EventArgs e)
{
if(this.Opacity==0)
{
this.timer2.Enabled=false;
Application.Exit();
}
else
{
this.Opacity = this.Opacity-0.3;
}
}
}
}