C#的子窗体、不显示任务栏、背景透明

private void button1_Click_1(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            f2.MdiParent = this;
            f2.Show();
        }
this.ShowInTaskbar = false;///使窗体不显示在任务栏

this.BackColor =Color.White;
this.TransparencyKey = Color.White;

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