public ErrorData Delete(Context context, SiteSettings ss, bool notice = false)
{
var statements = new List <SqlStatement>();
var where = Rds.RegistrationsWhere().RegistrationId(RegistrationId);
statements.AddRange(new List <SqlStatement>
{
Rds.DeleteRegistrations(where : where),
});
Rds.ExecuteNonQuery(
context: context,
transactional: true,
statements: statements.ToArray());
return(new ErrorData(type: Error.Types.None));
}