c#之圆形无标题栏椭圆窗体的实现详解

步骤如下：

1.新建窗体，并隐藏标题栏。

2.导入图片为窗体BackgroundImage。适当将BackgroundImageLayout属性设置为Strech.

3.导入命名空间以便可以绘制二维图形：

using System.Drawing.Drawing2D;

        private void Form1_Load(object sender, EventArgs e)
        {
            this.Left = (SystemInformation.PrimaryMonitorMaximizedWindowSize.Width - this.Width) / 2;
            this.Top = (SystemInformation.PrimaryMonitorMaximizedWindowSize.Height - this.Height) / 2;
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            GraphicsPath Myformpath = new GraphicsPath();
            Myformpath.AddEllipse(0,0,this.Width-30,this.Height-30);
            this.Region = new Region(Myformpath);
        }

        private void Form1_DoubleClick(object sender, EventArgs e)
        {
            Application.Exit();
        }