Randomizing SharePoint’s Content Query Web Part

Listing 6: FindControlRecursive Method
private Control FindControlRecursive(Control rootControl, string controlID)
{
    if (rootControl.ID == controlID) return rootControl;

    foreach (Control controlToSearch in rootControl.Controls)
    {
        Control controlToReturn =
            FindControlRecursive(controlToSearch, controlID);
            
        if (controlToReturn != null) return controlToReturn;
    }
    return null;
}