Navigate through Controls and Components
public void Traverse(Control cnt)
{
    foreach (Control c in cnt.Controls)
    {
        if (c.HasChildren) Traverse(c);
        Debug.Print(c.Name); // For debugging purpose only
        // My code goes here
    }
}

private void GetControls(ICollection controls, IList<string> names)
{
    foreach (var ctl in controls)
    {
        if (ctl is IComponent)
        {
            var name = ctl.GetType().GetProperty("Name");
            if (name != null)
                names.Add((string) name.GetValue(ctl, null));

            foreach (var property in ctl.GetType().GetProperties())
            {
                var prop = property.GetValue(ctl, null);
                if (prop is ICollection)
                    GetControls((ICollection)prop, names);
            }
        }
    }
}

var ctlNames = new List<string>();
GetControls(Controls, ctlNames);