C# 半透明渐显窗体

        private void timer1_Tick(object sender, EventArgs e)        {            this.Opacity += 0.1;              if (this.Opacity >= 1.0)  //当Form完全显示时，停止计时             {                this.timer1.Enabled = false;             }        }        private void Form1_Load(object sender, EventArgs e)        {            this.Opacity = 0;        }