private void Delete_Recur(DBFrontEnd db, GroupProduct gp)
{
List <GroupProduct> ListGroupProduct = gp.GroupProductChildrens.ToList();
if (ListGroupProduct != null)
{
foreach (var i in ListGroupProduct)
{
Delete_Recur(db, i);
}
}
List <Product> ListProduct = gp.Products.ToList();
if (ListProduct != null)
{
foreach (var i in ListProduct)
{
db.Products.Remove(i);
}
db.SaveChanges();
}
db.GroupProducts.Remove(gp);
db.SaveChanges();
}