OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Documents and Settings\shaktisingh.tanwar\Desktop\Image.mdb");
        OleDbCommand cmd = new OleDbCommand("select * from ImageDb", con);
        OleDbDataAdapter da = new OleDbDataAdapter(cmd);

        DataSet ds = new DataSet();
        da.Fill(ds);
        byte[] bt =  (byte[])ds.Tables[0].Rows[1]["Content"];
        
        MemoryStream mem =  new System.IO.MemoryStream(bt);
      
        System.Drawing.Image img = System.Drawing.Image.FromStream(mem);
        img.Save(Server.MapPath("test2.jpg"));
        //Session["abc"] = "12";
        //int ctr=0;
        //foreach (System.Collections.Specialized.NameObjectCollectionBase.KeysCollection obj in Session.Keys)
        //    obj.Get(ctr);
        mem.Close();
        Image1.ImageUrl ="~/test2.jpg";
        PlaceHolder1.Controls.Add(Image1);