How to find nested controls in ASP.Net Webforms

I made a little helper class to find all controls of a certain type on a page or within any control that can contain other controls.

Please use it with care since it could be quite heavy on a page with thousands of control. Do not pass the entire page unless absolutely necessary.

/// <summary>

/// Finds all controls of type T stores them in FoundControls

/// </summary>

/// <typeparam name="T"></typeparam>

private class ControlFinder<T> where T : Control 

{

    private readonly List<T> _foundControls = new List<T>();

    public IEnumerable<T> FoundControls

    {

        get { return _foundControls; }

    }    

    public void FindChildControlsRecursive(Control control)

    {

        foreach (Control childControl in control.Controls)

        {

            if (childControl.GetType() == typeof(T))

            {

                _foundControls.Add((T)childControl);

            }

            else

            {

                FindChildControlsRecursive(childControl);

            }

        }

    }

}