Double buffer with Bitmap

   
  
using System;
using System.Drawing;
using System.Windows.Forms;

public class Form1 : Form {
    Pen p;
    SolidBrush b, bT = new SolidBrush(Color.Black);
    string path = "5.bmp";
    Image im;
    Font f;

    public Form1() {
        Color cP = Color.Gray;
        Color cB = Color.LightGray;

        p = new Pen(cP, 6);
        b = new SolidBrush(cB);
        im = Image.FromFile(path);
        f = new Font(new FontFamily("Times New Roman"), 10);
    }
    static void Main() {
        Application.Run(new Form1());
    }
    protected override void OnPaint(PaintEventArgs pea) {
        Sketch();
        //SketchDBuf();
    }
    private void Sketch() {
        Graphics g = Graphics.FromHwnd(this.Handle);

        g.FillRectangle(b, 4, 4, 260, 220);
        g.DrawRectangle(p, 4, 4, 260, 220);
        g.DrawImage(im, 33, 35, 200, 145);
        g.DrawString("AAAAAA", f, bT, 180, 190);

        g.Dispose();
    }
    private void SketchDBuf() {
        int hh = 3, w = 260, h = 220;

        Graphics g;
        Bitmap bm = new Bitmap(w + 2 * hh, h + 2 * hh);
        g = Graphics.FromImage(bm);

        g.FillRectangle(b, hh, hh, w, h);
        g.DrawRectangle(new Pen(Color.Gray, 2 * hh), hh, hh, w, h);
        g.DrawImage(im, hh + 30, hh + 32, 200, 145);
        g.DrawString("Text", f, bT, 180, 190);
        g = Graphics.FromHwnd(this.Handle);
        g.DrawImage(bm, 1, 1);

        g.Dispose();
    }
}

   
     


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