C:/Private/OSS/n2cms/github/n2cms/src/Framework/N2/Collections/RecursiveFinder.cs

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using System;
using System.Collections.Generic;
using System.Text;

namespace N2.Collections
{
        public class RecursiveFinder
        {
        public IEnumerable<T> Find<T>(ContentItem root, int recursionDepth)
                        where T : class
                {
                        List<T> items = new List<T>();
                        AppendRecursive(root, items, recursionDepth);
                        return items;
        }

        public IEnumerable<T> Find<T>(ContentItem root, int recursionDepth, params Type[] except)
            where T : class
        {
            List<T> items = new List<T>();
            AppendRecursive(root, items, recursionDepth, except);
            return items;
        }

        private void AppendRecursive<T>(ContentItem item, List<T> items, int depth, params Type[] except)
                        where T : class
                {
                        if (item is T)
                                items.Add(item as T);

                        if (depth <= 0)
                                return;

                        foreach (ContentItem child in item.Children)
                        {
                if (Is(child, except))
                    continue;

                                AppendRecursive(child, items, depth - 1);
                        }
                }

        private static bool Is(ContentItem child, Type[] except)
        {
            foreach (Type t in except)
                if (t.IsAssignableFrom(child.GetContentType()))
                    return true;
            return false;
        }
        }
}