DataTableToXML

        public string CovertDataTableToXML(DataTable datatable)
        {
            StringBuilder strXml = new StringBuilder();
            strXml.AppendLine("");
            for (int i = 0; i < datatable.Rows.Count; i++)
            {
                strXml.AppendLine("");
                for (int j = 0; j < datatable.Columns.Count; j++)
                {
                    strXml.AppendLine("<"+datatable.Columns[j].ColumnName+">"+datatable.Rows[i][j]+""+"<"+datatable.Columns[j].ColumnName+">");
                }
                strXml.AppendLine("");
            }
            strXml.AppendLine("");
            return strXml.ToString();
        }