How to add Hyperlink

int i = 1;
            if (source != null || source.Tables.Count == 0)
            {
                foreach (DataTable dt in source.Tables)
                {
                    sw.Write("<Worksheet ss:Name=\"" + replaceXmlChar(dt.TableName) + "\"><Table><Row><Cell  ss:StyleID=\"s62\"><Data ss:Type=\"String\"></Data></Cell></Row> ");
                    //sw.Write("<Worksheet ss:Name=\"" + replaceXmlChar(dt.TableName) + "\"><Table><Row><Cell  ss:StyleID=\"s62\"><Data ss:Type=\"String\"></Data> </Cell></Row></Table></Worksheet>");
                    sw.Write("<Row>\r\n");
                    dt.Columns.Add("Data");
                    dt.Rows.Add("Test Data" + i);
                    i++;
                    foreach (DataColumn dc in dt.Columns)
                    {
                        sw.Write(
                              string.Format("<Cell ss:StyleID=\"s62\"><Data ss:Type=\"String\">{0}</Data></Cell>",
                                          replaceXmlChar(dt.Rows[0][dc.ColumnName].ToString())));

                    } sw.Write("</Row>\r\n");
                    sw.Write("</Table></Worksheet>");
                }