Write on XML file

private void WriteXml()
{
int intSubCatId = 0;
if (Request.QueryString["SId"] != null)
{
intSubCatId = Convert.ToInt32(Request.QueryString["SId"]);

var result = from subcat in db.tblSubCategories
join alb in db.tblAlbums on subcat.SubCategoryId equals alb.SubCatId
where subcat.SubCategoryId == intSubCatId
select new { FlashImage = alb.PicUrl };

if (result.Count() > 0)
{
string strxmlDocpath = Server.MapPath("~/flash/banner/xml/banner.xml");
XmlTextWriter writer = null;
try
{
writer = new XmlTextWriter(strxmlDocpath, Encoding.UTF8);
writer.Formatting = Formatting.Indented; writer.WriteStartDocument(true);

writer.WriteComment("This file was generated from an ASPX file");

writer.WriteStartElement("banner");

writer.WriteAttributeString("width", "597");
writer.WriteAttributeString("height", "354");
writer.WriteAttributeString("startWith", "1");

foreach (var query in result)
{
string strImage = query.FlashImage;
string strSlideImg = strImage.Replace("~/flash/banner/", "");
writer.WriteStartElement("item");
writer.WriteElementString("path", null, strSlideImg);
writer.WriteElementString("title", null, "");
writer.WriteElementString("target", null, "_blank");
writer.WriteElementString("link", null, "");
writer.WriteElementString("bar_color", null, "0xffffff");
writer.WriteElementString("bar_transparency", null, "40");
writer.WriteElementString("caption_color", null, "0xffffff");
writer.WriteElementString("caption_transparency", null, "60");
writer.WriteElementString("stroke_color", null, "0xffffff");
writer.WriteElementString("stroke_transparency", null, "60");
writer.WriteElementString("slideshowTime", null, "8");
writer.WriteEndElement();

}


writer.WriteEndElement();
writer.Flush();
writer.Close();
XmlDocument doc = new XmlDocument();
doc.Load(strxmlDocpath);

doc.Save(strxmlDocpath);
}
catch (Exception ex)
{

}
finally
{

}
Flash.Visible = true;
}
else
{
Flash.Visible = false;
}
}


}