Returning Word Document from Asp.net

 protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
    {
       
        //string path = Server.MapPath("Help File editorial.doc");
        string path = Server.MapPath("check.doc");
        //System.IO.FileInfo file = new System.IO.FileInfo("D:\\EEditorial\\Help\\Help File editorial.doc");
        System.IO.FileInfo file = new System.IO.FileInfo("D:\\check.doc");
        if (file.Exists)
        {
            Response.Clear();
            Response.AddHeader("Content-Disposition", "atta ...