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copied!<p>Define a simple Crosshairs type that is a wrapper for a string, object dictionary:</p> <pre><code>class CrosshairsCollection : List<Crosshairs> { } class Crosshairs { private Dictionary<string, object> dict = new Dictionary<string,object>(); public IEnumerable<KeyValuePair<string, object>> GetAllProperties() { foreach (string key in dict.Keys) { yield return new KeyValuePair<string, object>(key, dict[key]); } } public object GetProperty(string s) { object value; bool exists = dict.TryGetValue(s, out value); if (!exists) { value = null; } return value; } public void SetProperty(string s, object o) { if (!dict.ContainsKey(s)) { dict.Add(s, o); } else { dict[s] = o; } } } </code></pre> <p>Then implement a JavaScriptConverter for CrosshairsCollection, similar to this: <a href="http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptconverter.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptconverter.aspx</a></p> <p>Replace your List with CrosshairsCollection and register the JavaScriptConverter with your JavaScriptSerializer instance. </p> <p>[<strong>Edit:</strong> answers to follow up questions]</p> <p>I'm assuming that you have two follow-up questions, both numbered 1, and that the second one is "how do I get the JSON output to be more like my original example?" :)</p> <p>The way I interpreted your original XML was that a tooltip has multiple crosshairs, and not a single crosshairs with multiple, overlapping property definitions. The representation in the XML and your name usage in the code aren't in accord though: you call the entire thing "crosshairs." Bear that in mind as you're reading my original and edited response.</p> <p>So to get an object that mimics the original XML, I would have expected you to provide the properties like so:</p> <pre><code>CrosshairsCollection crosshairsList = new CrosshairsCollection(); Crosshairs c1 = new Crosshairs(); c1.SetProperty("width", 3); c1.SetProperty("color", "green"); c1.SetProperty("padding", "5px"); crosshairsList.Add(c1); Crosshairs c2 = new Crosshairs(); c2.SetProperty("width", 3); c2.SetProperty("color", "blue"); crosshairsList.Add(c2); </code></pre> <p>Take that one step further, turn each Crosshairs initialization into a factory method, and plug it into your XML representation, like you're doing in the <code>HCToolTip</code> constructor. </p> <p>Then, you can add each name value pair into the JSON output as they are:</p> <pre><code>foreach (Crosshairs crosshairs in crosshairsList) { Dictionary<string, object> crosshairProps = new Dictionary<string, object>(); foreach (KeyValuePair<string, object> prop in crosshairs.GetAllProperties()) { crosshairProps.Add(prop.Key, prop.Value); } itemsList.Add(crosshairProps); } result["crosshairs"] = itemsList; </code></pre> <p>You might need to implement a JavaScriptConverter one level higher up, on ToolTip, in order to get an anonymous list as the property value for <code>ToolTip.crosshairs</code>. </p> <p>I hope what this is showing though is that really all you're looking for is a key/value collection. I named the classes <code>CrosshairsCollection</code> and <code>Crosshairs</code> to try to draw the distinction between a list of <code><crosshairs></code> tags and the subtree of a <code><crosshairs></code> tag. But you could name them <code>MultiPropertyItemCollection</code> and <code>MultiPropertyItem</code>, or whatever, because there's nothing type specific in the implementation.</p>

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