generate xml file from sql server 2005 database using asp.net (C#) 2.0

Hello,
I am working on a web application. I want to generate xml file from database table. I am working on asp.net(C#) 2.0.
If you have any idea please guide me.
I have done some work on it

----------------------


SqlConnection sqlCon;
SqlCommand cmd = new SqlCommand();
SqlDataAdapter da = new SqlDataAdapter();
DataSet dsTest = new DataSet("table");
DataTable dt = new DataTable("table");
string XmlFileName = "";

protected void Page_Load(object sender, EventArgs e)
{
XmlFileName = "D:/Ashraf/XMLFileFromdatabase";
sqlconnection con = ConfigurationManager.AppSettings["LocalSqlServer"];

string Query = "select * tblMaster";
XMLGenerate(con, Query, XmlFileName);
}

private void XMLGenerate(string conString, string Query, string FileName)
{
sqlCon = new SqlConnection(con);
da.SelectCommand = new SqlCommand(Query, sqlCon);
da.Fill(dsTest);
FileStream fs = null;
fs = new FileStream(FileName + ".xml", FileMode.OpenOrCreate, FileAccess.Write);
dsTest.WriteXml(fs);
fs.Close();
}