How do you find out when you’ve been loaded via XML Serialization?

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Hmmm… it’s still not pretty but you could refactor your deserialization logic into a dedicated class which could notify the deserialized object that it originated from XML before returning it to the caller.

Update: I think this should be fairly easy to do without straying too far from the patterns laid by the framework… you’d just need to ensure that you use the CustomXmlSerializer. Classes that need this notification just need to implement IXmlDeserializationCallback

using System.Xml.Serialization;

namespace Custom.Xml.Serialization
{
    public interface IXmlDeserializationCallback
    {
        void OnXmlDeserialization(object sender);
    }

    public class CustomXmlSerializer : XmlSerializer
    {
        protected override object Deserialize(XmlSerializationReader reader)
        {
            var result = base.Deserialize(reader);

            var deserializedCallback = result as IXmlDeserializationCallback;
            if (deserializedCallback != null)
            {
                deserializedCallback.OnXmlDeserialization(this);
            }

            return result;
        }
    }
}

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