public class CommunicationClient : IClient
{
    public CommunicationClient(IServerSettings settings) { ... }
    // Code
}

public class SettingsManager : ISettingsManager
{
    SettingsManager(IDbSettingManager manager)

    // Code
    public IDictionary<string, string> GetSettings() { ... }
}

container.Register(typeof(ICommunicationClient), typeof(CommunicationClient));
ISettingsManager settingsManager = container.GetInstance<ISettingsManager>();

string url = settingsManager.GetSetting("url");
string userName = settingsManager.GetSetting("username");
string password = settingsManager.GetSetting("password");

container.Register(typeof(IServerConfiguration), () =>
      new ServerConfiguration(url, userName, password);

var settingsManager = new SettingsManager(new SqlSettingManager("connStr"));

container.RegisterSingle<ISettingsManager>(settingsManager);
container.Register<ICommunicationClient, CommunicationClient>();

string url = settingsManager.GetSetting("url");
string userName = settingsManager.GetSetting("username");
string password = settingsManager.GetSetting("password");

container.Register<IServerConfiguration>(() =>
      new ServerConfiguration(url, userName, password));

public class CommunicationClientFactory : ICommunicationClientFactory
{
   public CommunicationClientFactory(ISettingsManager settingsManager) {...}

   public CreateClient() {...}
}

public class CommunicationClient : IClient
{
    public CommunicationClient() { ... }
    // Code

    CommunicationClient WithSettings(IServerSettings settings) { ... }
}