public void redraw()  
         {

             using (Graphics g = this.panel1.CreateGraphics())
             {

             

                 Pen pen = new Pen(Color.Blue, 1);
                 Brush brush = new SolidBrush(Color.Violet);
                 g.Clear(Color.White);
                 for (int i = 0; i < mapheight; i++)
                 {
                     for (int j = 0; j < mapwidth; j++)
                     {
                         if (collis[i, j] != 0) g.FillRectangle(brush, i * 32, j * 32, 32, 32);
                         else
                             if (grid == true) g.DrawRectangle(pen, i * 32, j * 32, 32, 32);
                     }
                 }

                 if (imgbuff != null)
                 {
                     for (int i = 0; i < numtile; i++)  
                     {
                         g.DrawImage(naborpic [idxtile[i]], new Point(coordtileX[i]-(int)cumX, coordtileY[i]-(int)cumY));
                     }
                      
                         g.DrawImage(imgbuff, new Point(mX * 32, mY * 32), 0.5f);

                     pen = new Pen(Color.Red, 1);
                     int h = imgbuff.Size.Height;
                     int w = imgbuff.Size.Width;
                     g.DrawRectangle(pen, mX * 32, mY * 32, w, h);
                 }
                 pen.Dispose();
             }
         }

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
     public class MyDrawPanel : UserControl
     {
         public MyDrawPanel()
         {
             SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);
         }

         protected override void OnPaint(PaintEventArgs e)
         {
            
         }

         private void InitializeComponent()
         {
             this.SuspendLayout();
             //  
             // MyDrawPanel
             //  
             this.Name = "MyDrawPanel";
             this.Size = new System.Drawing.Size(800, 600);
             this.ResumeLayout(false);

         }
     }
}