Recursive call return a List, return type causing me issues

Question

I have a recursive method that is return me categories, and checking for its sub categories.

So it looks like:

public List GetAllChildCat         


        

Answer 1

Here's a modified version of Jon Skeet's answer using a local method (C# 7) :

    public List GetAllChildCats(int rootId)
    {
        List list = new List();
        Traverse(rootId);
        return list;

        void Traverse(int categoryId)
        {
            Category c = Get(categoryId);
            list.Add(c);

            foreach (Category cat in c.ChildCategories)
            {
                Traverse(cat.CategoryID);
            }
        }
    }