/// <summary>
/// Speichert die Einstellungen in eine Datei
/// </summary>
/// <param name="filename">Dateiname</param>
public void Save(string filename = "settings.txt")
{
List <string> lines = new List <string>();
lines.Add(ServerConnection.ToString());
lines.Add(ClientConnection.ToString());
lines.Add(UserName);
lines.Add(Key);
File.WriteAllLines(filename, lines, Encoding.UTF8);
}
