static bool CheckEven(Component obj)
{
if (obj.GetNum() % 2 != 0)
{
return(false);
}
if (obj.GetChilds() == null)//in case a leaf is last
{
if (obj.GetNum() % 2 != 0)
{
return(false);
}
}
foreach (Component c in obj.GetChilds())
{
return(CheckEven(c));
}
return(true);
}