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copied!<p>(edit - I misread the original question)</p> <p>You cannot add actual attributes (they are burned into the IL); however, with <code>XmlSerializer</code> you don't have to - you can supply additional attributes in the constructor to the <code>XmlSerializer</code>. You do, however, need to be a little careful to cache the <code>XmlSerializer</code> instance if you do this, as otherwise it will create an additional assembly per instance, which is a bit leaky. (it doesn't do this if you use the simple constructor that just takes a <code>Type</code>). Look at <a href="http://msdn.microsoft.com/en-us/library/system.xml.serialization.xmlattributeoverrides.aspx" rel="noreferrer"><code>XmlAttributeOverrides</code></a>.</p> <p>For an example:</p> <pre><code>using System; using System.Xml.Serialization; public class Person { static void Main() { XmlAttributeOverrides overrides = new XmlAttributeOverrides(); XmlAttributes attribs = new XmlAttributes(); attribs.XmlIgnore = false; attribs.XmlElements.Add(new XmlElementAttribute("personName")); overrides.Add(typeof(Person), "Name", attribs); XmlSerializer ser = new XmlSerializer(typeof(Person), overrides); Person person = new Person(); person.Name = "Marc"; ser.Serialize(Console.Out, person); } private string name; [XmlElement("name")] [XmlIgnore] public string Name { get { return name; } set { name = value; } } } </code></pre> <p>Note also; if the xml attributes were just illustrative, then there is a <em>second</em> way to add attributes for things related to data-binding, by using <code>TypeDescriptor.CreateProperty</code> and either <code>ICustomTypeDescriptor</code> or <code>TypeDescriptionProvider</code>. Much more complex than the xml case, I'm afraid - and doesn't work for all code - just code that uses the component-model.</p>

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