void SaveConfig()
{
IL2Config save = new IL2Config();
int.TryParse(portTextBox.Text, out save.port);
string output = JsonConvert.SerializeObject(save, Formatting.Indented);
File.WriteAllText(saveFilename, output);
}
void LoadConfig()
{
if (File.Exists(saveFilename))
{
string text = File.ReadAllText(saveFilename);
IL2Config config = JsonConvert.DeserializeObject <IL2Config>(text);
portTextBox.Text = "" + config.port;
}
}