C#圆角窗体简单实现方法

public partial class Form1 : Form{  public Form1()  {   InitializeComponent();  }  private void Form1_Resize(object sender, EventArgs e)  {   Type(this, 25, 0.1);  }  private void Type(Control sender, int p_1, double p_2)  {   GraphicsPath oPath = new GraphicsPath();   oPath.AddClosedCurve(new Point[] { new Point(0, sender.Height / p_1), new Point(sender.Width / p_1, 0), new Point(sender.Width - sender.Width / p_1, 0), new Point(sender.Width, sender.Height / p_1), new Point(sender.Width, sender.Height - sender.Height / p_1), new Point(sender.Width - sender.Width / p_1, sender.Height), new Point(sender.Width / p_1, sender.Height), new Point(0, sender.Height - sender.Height / p_1) }, (float)p_2);   sender.Region = new Region(oPath);  }  private void Form1_Paint(object sender, PaintEventArgs e)  {   Type(this, 25, 0.1);  }}