在Windows窗体上绘制一个像素

using System.Drawing;
using System.Drawing.Drawing2D;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        // 创建一个GraphicsPath对象，用于描述像素级别的路径
        GraphicsPath path = new GraphicsPath();
        path.AddLine(0, 0, 100, 100);
        path.CloseFigure();

        // 将GraphicsPath对象绘制到窗体上
        e.Graphics.DrawPath(Pens.Black, path);
    }
}