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POXmlSerialize a custom collection with an Attribute
 

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    <p>I've got a simple class that inherits from Collection and adds a couple of properties. I need to serialize this class to XML, but the XMLSerializer ignores my additional properties.</p> <p>I assume this is because of the special treatment that XMLSerializer gives ICollection and IEnumerable objects. What's the best way around this?</p> <p>Here's some sample code:</p> <pre><code>using System.Collections.ObjectModel; using System.IO; using System.Xml.Serialization; namespace SerialiseCollection { class Program { static void Main(string[] args) { var c = new MyCollection(); c.Add("Hello"); c.Add("Goodbye"); var serializer = new XmlSerializer(typeof(MyCollection)); using (var writer = new StreamWriter("test.xml")) serializer.Serialize(writer, c); } } [XmlRoot("MyCollection")] public class MyCollection : Collection&lt;string&gt; { [XmlAttribute()] public string MyAttribute { get; set; } public MyCollection() { this.MyAttribute = "SerializeThis"; } } } </code></pre> <p>This outputs the following XML (note MyAttribute is missing in the MyCollection element):</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;MyCollection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt; &lt;string&gt;Hello&lt;/string&gt; &lt;string&gt;Goodbye&lt;/string&gt; &lt;/MyCollection&gt; </code></pre> <p>What I <em>want</em> is</p> <pre><code>&lt;MyCollection MyAttribute="SerializeThis" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt; &lt;string&gt;Hello&lt;/string&gt; &lt;string&gt;Goodbye&lt;/string&gt; &lt;/MyCollection&gt; </code></pre> <p>Any ideas? The simpler the better. Thanks.</p>
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