C#

protected override void WndProc(ref Message m)
   {
        Debug.Print("out if: " + m.Msg);
        if (m.Msg == WM_NOFITY)
            {
                Debug.Print("in if: " + m.Msg);
            }
  }

private volatile string _InputTypeString = "";
public string InputTypeString
{
    get { return _InputTypeString; }
    set { _InputTypeString = value; OnPropertyChanged("InputTypeString"); }
}

Action b = delegate { windowmodel.Frame_Current = FrameX };
Application.Current.Dispatcher.Invoke(b, DispatcherPriority.Normal);

lock (windowmodel.AudioLevelArray)

static void Main()
    {
        List<int> list = new List<int>();
        list.Add(7);
        list.Add(11);
        list.Add(13);

        // See if any elements with values greater than 10 exist.
        bool exists = list.Exists(element => element > 10);
        Console.WriteLine(exists);

        // Check for numbers less than 7.
        exists = list.Exists(element => element < 7);
        Console.WriteLine(exists);
    }

class Program
{
  static void Main(string[] args)
  {
    ProductCounterWatcher w = new ProductCounterWatcher();
    ICounterProcessor p = new PrdStandStillDetector();
    w.OnCounterChanged += p.CounterChanged;
    w.Detect();
    w.OnCounterChanged -= p.CounterChanged;
  }
}
//-----------------------------------------------------------------------------------
public class ProductCounter
{
  public int Value { get; set; }
  public DateTime Timestamp { get; set; }

  public override string ToString()
  {
    return string.Format("[ProductCounter:{0},{1}]", Timestamp, Value);
  }
}
//-----------------------------------------------------------------------------------
public interface ICounterProcessor
{
  void CounterChanged(object source, CounterChangedEventArgs e); // <<<----
}
//-----------------------------------------------------------------------------------

public delegate void CounterChangedHandler(object source, CounterChangedEventArgs e); // <<<----
//-----------------------------------------------------------------------------------

public class CounterChangedEventArgs : EventArgs
{
  public ProductCounter Counter { get; set; }

  public CounterChangedEventArgs(ProductCounter counter)
  {
    this.Counter = counter;
  }
}
//-----------------------------------------------------------------------------------
public class PrdStandStillDetector : ICounterProcessor
{
  public void CounterChanged(object source, CounterChangedEventArgs e)
  {
  }
}
//-----------------------------------------------------------------------------------
public class ProductCounterWatcher
{
  public CounterChangedHandler OnCounterChanged;

  public void Detect()
  {
    if (OnCounterChanged != null) OnCounterChanged(this, new CounterChangedEventArgs(new ProductCounter() { Timestamp = DateTime.Now, Value = 1 }));
  }
}