在运行时绘制椭圆并使用拓宽方法

**我使用以下代码在运行时绘制椭圆。在代码中，我使用图形路径绘图(实际上这是项目要求)，并使用拓宽方法的图形路径。但是它给出了运行时异常"内存不足"。我可以在椭圆的情况下使用这个方法吗?

在运行时绘制矩形的情况下，使用width方法可以正常工作。

请解决这个问题并给我一些建议。* *

public partial class Form2 : Form
   {
       public Form2()
       {
           InitializeComponent();
       }
        Rectangle r;
        bool isDown = false;
        int initialX;
        int initialY;
        bool IsDrowing =true;
        GraphicsPath gp1;
        GraphicsPath gp2;
        GraphicsPath gp3;
        GraphicsPath gp;
       Graphics g;
       bool contained;
       bool containedE;
       bool containedC;
    private void Form2_MouseDown(object sender, MouseEventArgs e)
    { 
       isDown = true;
       IsDrowing = true;
      initialX = e.X;
     initialY = e.Y;
    }
    private void Form2_MouseMove(object sender, MouseEventArgs e)
    {
    //IsDrowing = true;
    if (isDown == true)
     {

     int width = e.X - initialX, height = e.Y - initialY;
     r = new Rectangle(Math.Min(e.X, initialX),
                      Math.Min(e.Y, initialY),
                     Math.Abs(e.X - initialX),
                    Math.Abs(e.Y - initialY));

                this.Invalidate();

      }
    }
    private void Form2_Paint(object sender, PaintEventArgs e)
    {
    g = this.CreateGraphics();
    gp = new GraphicsPath();
    Pen pen = new Pen(Color.Red);
    gp.AddEllipse(r);
    gp.Widen(pen);
    pen.DashStyle = DashStyle.Dash;
    if (IsDrowing)
    {
    g.DrawPath(pen, gp);
    }
    private void Form2_MouseUp(object sender, MouseEventArgs e)
        {
            IsDrowing = false;
            this.Refresh();
         }
    }

private void Form2_Paint(object sender, PaintEventArgs e)
{
    if (IsDrowing)
    {
        g = e.Graphics;
        gp = new GraphicsPath();
        gp.AddEllipse(r);
        gp.Widen(new Pen(Color.Red, 10));
        Pen pen = new Pen(Color.Red, 1);
        pen.DashStyle = DashStyle.Dash;
        g.DrawPath(pen, gp);
    }
}