protected void Page_Load(object sender, EventArgs e)
        {
            int x = Convert.ToInt32(Request.QueryString["Ogrid"]);

            Response.Write(x);
            EntityOgrenci ent = new EntityOgrenci();

            ent.Ogrid = x;
            OgrenciBusiness.BusinessOgrenciSil(ent.Ogrid);
            Response.Redirect("OgrenciListele.aspx");
        }