internal static Menu Union(Menu first, Menu second)
{
Menu result = null;
if (first == null)
{
if (second != null)
{
result = second.Clone();
}
}
else
{
result = first.Clone();
if (second != null)
{
foreach (var item in second.Children)
{
if (!result.ContainsChild(item.Id))
{
result.AppendChild(item);
}
}
}
}
return(result);
}
