winfrom屏幕左下角弹出窗口

//Form3为要弹出的窗口调用即可，窗口添加控件timer1，timer2 
public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
        }

        int a =5;
        double b = 0.05;
        int _y = 600;
        private void Form3_Load(object sender, EventArgs e)
        {
            this.Opacity = 0;
            timer1.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            _y -= a;
            this.Location = new Point(3, _y);
            this.Opacity += b;
            if (_y == 450)
            {
                timer2.Start();
                timer1.Stop();
            }
        }

        int c = 0;
        int d=5;
        private void timer2_Tick(object sender, EventArgs e)
        {
            c += d;
            if (c == 100)
            {
                d = 0;
                this.Opacity -= 0.02;
                    if(this.Opacity==0)
                    {
                        timer2.Stop();
                        timer2.Dispose();
                        this.Close();
                    }
            }
        }
    }