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    copied!<pre><code>using System; using System.Linq; using System.Xml.Linq; using System.Collections.Generic; namespace App { class Scrambler { public static void ScrambleTextNodes(XContainer xml) { foreach (XText textNode in GetDescendantTextNodes(xml)) textNode.Value = Scramble(textNode.Value); } public static void UnScrambleTextNodes(XContainer xml) { foreach (XText textNode in GetDescendantTextNodes(xml)) textNode.Value = UnScramble(textNode.Value); } public static IEnumerable&lt;XNode&gt; GetDescendantTextNodes(XContainer xml) { return xml.DescendantNodes().Where(node =&gt; node.NodeType == System.Xml.XmlNodeType.Text); } public static string Scramble(string s) { var a = s.Select(ch =&gt; (char)(ch + 3)).ToArray(); return new string(a); } public static string UnScramble(string s) { var a = s.Select(ch =&gt; (char)(ch - 3)).ToArray(); return new string(a); } } class Program { static void Main(string[] args) { var doc = XDocument.Parse("&lt;a&gt;&lt;b&gt;this&lt;/b&gt;&lt;b&gt;&lt;c&gt;is&lt;/c&gt;&lt;c&gt;&lt;d&gt;a test&lt;/d&gt;&lt;/c&gt;&lt;/b&gt;&lt;/a&gt;"); Scrambler.ScrambleTextNodes(doc); Console.WriteLine(doc.ToString()); Scrambler.UnScrambleTextNodes(doc); Console.WriteLine(doc.ToString()); Console.ReadLine(); } } } </code></pre> <p>Output:</p> <pre><code>&lt;a&gt; &lt;b&gt;wklv&lt;/b&gt; &lt;b&gt; &lt;c&gt;lv&lt;/c&gt; &lt;c&gt; &lt;d&gt;d whvw&lt;/d&gt; &lt;/c&gt; &lt;/b&gt; &lt;/a&gt; &lt;a&gt; &lt;b&gt;this&lt;/b&gt; &lt;b&gt; &lt;c&gt;is&lt;/c&gt; &lt;c&gt; &lt;d&gt;a test&lt;/d&gt; &lt;/c&gt; &lt;/b&gt; &lt;/a&gt; </code></pre> <p>You can always use some other scrambling algorithm. The scrambling itself is a translation to C# of Kai's Python answer.</p> <p>edit: clean-up :) edit2: removed the check to not scramble spaces. This would cause the unscrambling to be incorrect at times...</p>
 

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