Using predicates to reduce code coupling

switch.cs

public class Switch
{
  private bool _isOn;
  private Predicate<bool> _onCriteria;
  
  public Switch(Predicate<bool> onPredicate)
  {
    _onCriteria = onPredicate;
    _isOn = _onCriteria.Invoke(true); //When you see below the x will be true as that is the value we invoked it with
                                      //We can just as easily store a control value which we pass in
                                      //Or even make a generic switch to compare to other types
  }
  
  public void Update()
  {
    _isOn = _onCriteria.Invoke(true);
  }
}

public static Program
{
  public static void Main(string[] args)
  {
    var switch = new Switch(x => Settings.IsVolumeOn);
    switch.Update();
  }
}