how to give hyperlink in html file

DataTable dt = DAL.ExecStoredProc(DAL.DatabaseName.DB, "storedProc", param); StringBuilder sb = new StringBuilder(); 
sb.Append("<br /><br />"); 
sb.Append("<table border="0" cellpadding="3">"); 
for (int i = 0; i < dt.Rows.Count; i++) 
{     
    sb.Append("<tr><td>");     
    sb.Append(dt.Rows[i]["EMail"].ToString()); //here in this row which data will-
                                       //displaying that data having hyperlink
    sb.Append("</td></tr>"); 
} 
sb.Append("</table>"); 
return sb.ToString();