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    <p>Since the object graph may be cyclic, you cannot possibly make a Tree-based structure out of it. Your best bet is to represent the object graph by it's simplest components: nodes and vectors. </p> <p>More specifically, make each node (object) an element with a unique ID (perhaps provided by C#'s GetHashCode() method?). References to other objects (vectors) would be handled by referencing the ID of the object.</p> <p>Example classes (note that I don't know C# so my syntax may be a bit off):</p> <pre><code>public class SomeType { public int myInt { get; set; } } public class AnotherType { public string myString { get; set; } public SomeType mySomeType { get; set; } } public class LastType { public SomeType mySomeType { get; set; } public AnotherType myAnotherType { get; set; } } public class UserTypes{ static void Main() { LastType lt = new LastType(); SomeType st = new SomeType(); AnotherType atype = new AnotherType(); st.myInt = 7; atype.myString = "BOB"; atype.mySomeType = st; lt.mySomeType = st; lt.myAnotherType = atype; string xmlOutput = YourAwesomeFunction(lt); } } </code></pre> <p>Then we would expect the value of xmlOutput to be something like this (note that the ID values chosen are completely synthetic):</p> <pre><code>&lt;ObjectMap&gt; &lt;LastType id="0"&gt; &lt;mySomeType idref="1" /&gt; &lt;myAnotherType idref="2" /&gt; &lt;/LastType&gt; &lt;SomeType id="1"&gt; &lt;myInt&gt;7&lt;/myInt&gt; &lt;/SomeType&gt; &lt;AnotherType id="2"&gt; &lt;myString&gt;BOB&lt;/myString&gt; &lt;mySomeType idref="1" /&gt; &lt;/AnotherType&gt; &lt;/ObjectMap&gt; </code></pre>
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    1. POTraversing an arbitrary C# object graph using XPath/applying XSL transforms
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    1. USAdam Hawkes
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    1. COThis doesn't actually answer my question. As I said, the problem has been solved -- it's just badly documented. And possibly cyclic object graphs will not necessarily be an issue if your XSLT transforms are evaluating them lazily.
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      1. USjammycakes
 

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