[Solved] Check value for 2 second

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This might be superfluous, I like using DispatcherTimer. This will tick every 2 seconds to look for a change:

private DispatcherTimer _checkNumberTimer = null;
private int _myNumber = int.MinValue;
private int _lastValue = int.MaxValue;

public Constructor1(){
  _checkNumberTimer = new DispatcherTimer();
  _checkNumberTimer.Tick += new System.EventHandler(HandleCheckNumberTick);
  _checkNumberTimer.Interval = new TimeSpan(0, 0, 0, 2); //Timespan of 2 seconds
  _checkNumberTimer.Start();
}

private void HandleLoginOrderDispatcherTick(object sender, System.EventArgs e) {
  if(_myNumber == _lastValue){
    MessageBox.Show("Alert!");
    _checkNumberTimer.Stop(); //If you want
  }
  _lastValue = _myNumber;
}

private void SomeOtherCodeAffectingMyNumber(int something){
  _myNumber = something;
}

You would need to include System.Windows.Threading.

The good thing about DispatcherTimer is that it handles all the work of delegating to the UI thread.

solved Check value for 2 second