public void AddNewServer(string address)
{
// ignore if address already exists
if (ServerModel.Servers.Any(s => s.EndPoint.ToString() == address))
{
return;
}
ServerModel.AddServer(address);
ServerModel.QueryServers();
// save to file
var addresses = ServerModel.Servers.Select(x => x.EndPoint.ToString()).ToArray();
File.WriteAllLines(savefile, addresses);
}