C#

private int _numberoflabels = 0;
private int _oldlabelcnt=0;
 
[DefaultValue(0)]
public int NumberOfLabels
{
    get
    {
        return _numberoflabels;
    }
    set
    {
        if(value!=_numberoflabels
        {
            _numberoflabels = value;
            CreateLabels(_numberoflabels);
        }
    }
}
 
private void CreateLabels(int actnumberoflabels)
{
    for(int x=oldlabelcnt; x<actnumberoflabels; x++)
    {
        Label l = new Label()
        .
        .
        .
    }
    _oldlabelcnt = actnumberoflabels;
}