public bool Contains(List<IceCandidate> list, List<BootstrapServer> bsslist) {
foreach (IceCandidate ice in list) {
foreach (BootstrapServer bs in bsslist) {
if (ice.addr_port.ipaddr.ToString() == bs.Host
&& ice.addr_port.port == bs.Port)
return true;
}
}
return false;
}