reading in xml files from folder

Question

The following code writes the single xml file to an sql table.
Can you please show me how to do a foreach so I can read in multiple files from a single directory

private void button1_Click(object sender, EventArgs e)

{

    string cs = @"Server=SQLEX\WS19;Database=XML;User Id=sa;Password=;";

    using (SqlConnection con = new SqlConnection(cs))

    {

            DataSet ds = new DataSet();

            ds.ReadXml(@"E:\XML\product.xml");

            DataTable dt1 = ds.Tables["cats"];

            con.Open();

            using (SqlBulkCopy bc = new SqlBulkCopy(con))

            {

                bc.DestinationTableName = "Category";

                bc.ColumnMappings.Add("catClass", "types");

                bc.ColumnMappings.Add("catDefinition", "description");

                bc.ColumnMappings.Add("cattValue", "amount");

                bc.WriteToServer(dt1);

            }               

    }

}

Thank you for any assistance or guidance