public static List <int> findChild(int parentId)
{
KidShopDbContext db = new KidShopDbContext();
List <int> list = db.Category.Where(r => r.ParentId == parentId).Select(r => r.CategoryId).Distinct().ToList();
if (list.Count() != 0)
{
List <int> l = new List <int>();
foreach (int i in list)
{
l.AddRange(findChild(i));
}
list.AddRange(l);
}
return(list);
}
