For example. Lets say we have a stackpanel on a form. Its full of both Grids and Labels. I want to loop through all the Grids and do some operation on them but leave the Lables intact. At the moment I am doing it this way.

foreach(UIElement element in m_stacker.Children)
{
    Grid block = element as Grid;
    if(block != null)
    {
      //apply changes here
    }
}

So i'm using the fact that "as" returns null if it cannot cast into the required type. Is this an ok thing to do or is there a better solution to this problem?