public string system_update_keyspace(KsDef ks_def)
{
#if !SILVERLIGHT
send_system_update_keyspace(ks_def);
return recv_system_update_keyspace();
#else
var asyncResult = Begin_system_update_keyspace(null, null, ks_def);
return End_system_update_keyspace(asyncResult);
#endif
}
#if SILVERLIGHT