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    copied!<p>This is how I would do it to cover a list of Nodes no matter how deep it is:</p> <p>The Node class:</p> <pre><code>public class Node { public Guid Id { get; set; } public DateTime Created { get; set; } public List&lt;Node&gt; Nodes { get; set; } public Node() { this.Nodes = new List&lt;Node&gt;(); } public List&lt;Node&gt; FindNodes(Func&lt;Node, bool&gt; condition) { List&lt;Node&gt; resList = new List&lt;Node&gt;(); if (this.Nodes != null &amp;&amp; this.Nodes.Count &gt; 0) { this.Nodes.ForEach(x =&gt; { resList.AddRange(x.FindNodes(condition)); if (condition(x)) resList.Add(x); } ); } return resList; } } </code></pre> <p>Having this list of Nodes for example:</p> <pre><code>List&lt;Node&gt; nodeList = new List&lt;Node&gt;() { new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 01, 10), Nodes = { new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 01, 11) }, new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 01, 12) } } }, new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 02, 10), Nodes = { new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 02, 11), Nodes = { new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 11, 11) }, new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 12, 12), Nodes = { new Node() { Id = Guid.NewGuid(), Created = new DateTime(2011, 11, 11) }, new Node() { Id = Guid.NewGuid(), Created = new DateTime(2011, 12, 12) } } } } }, new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 02, 12) } } }, new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 03, 10), Nodes = { new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 03, 11) }, new Node() { Id = Guid.NewGuid(), Created = new DateTime(2009, 03, 12) } } }, }; </code></pre> <p>I can find any sub-node I want like that:</p> <pre><code>List&lt;Node&gt; resList = new List&lt;Node&gt;(); nodeList.ForEach(x =&gt; resList.AddRange(x.FindNodes(y =&gt; y.Created.Day == 12))); </code></pre> <p>You can look by anything you want to. In the above example I search for nodes that are Created on the 12th day of any month and year.</p>
 

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