internal static Menu Intersact(Menu first, Menu second)
{
if (first == null || second == null || first.IsEmpty || second.IsEmpty)
{
return(null);
}
var result = first.CloneMain();
foreach (var item in first.Children)
{
if (second.ContainsChild(item.Id))
{
result.AppendChild(item.Clone());
}
}
return(result);
}
