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POIssue referencing System.Xml for external library using IXmlSerializable
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  1. POIssue referencing System.Xml for external library using IXmlSerializable
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    copied!<p>I've updated to a recent version of Xamarin Studio and a class I use shared with Visual Studio is no longer working between the 2 platforms. I've run into some compilation/runtime errors involving XML serialization. I have a library with the following class compiled in Xamarin studio:</p> <pre><code>[XmlRoot("dictionary")] [Serializable] public class SerializableDictionary&lt;TKey, TValue&gt; : Dictionary&lt;TKey, TValue&gt;, IXmlSerializable { #region IXmlSerializable Members public SerializableDictionary() { } public System.Xml.Schema.XmlSchema GetSchema() { return null; } public void ReadXml(System.Xml.XmlReader reader) { XmlSerializer keySerializer = new XmlSerializer(typeof(TKey)); XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue)); bool wasEmpty = reader.IsEmptyElement; reader.Read(); if (wasEmpty) return; while (reader.NodeType != System.Xml.XmlNodeType.EndElement) { reader.ReadStartElement("item"); reader.ReadStartElement("key"); TKey key = (TKey)keySerializer.Deserialize(reader); reader.ReadEndElement(); reader.ReadStartElement("value"); TValue value = (TValue)valueSerializer.Deserialize(reader); reader.ReadEndElement(); this.Add(key, value); reader.ReadEndElement(); reader.MoveToContent(); } reader.ReadEndElement(); } public void WriteXml(System.Xml.XmlWriter writer) { XmlSerializer keySerializer = new XmlSerializer(typeof(TKey)); XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue)); foreach (TKey key in this.Keys) { writer.WriteStartElement("item"); writer.WriteStartElement("key"); keySerializer.Serialize(writer, key); writer.WriteEndElement(); writer.WriteStartElement("value"); TValue value = this[key]; valueSerializer.Serialize(writer, value); writer.WriteEndElement(); writer.WriteEndElement(); } } #endregion } </code></pre> <p>I've compiled this DLL and am referencing it in a Windows project in Visual Studio like this:</p> <pre><code>SerializableDictionary&lt;string, string&gt; asdf = new SerializableDictionary&lt;string, string&gt;(); </code></pre> <p>This gives the compilation error: "The type 'System.Xml.Serialization.IXmlSerializable' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Xml, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'"</p> <p>Of course, I do actually have a reference to System.Xml. In fact if I copy the class from Xamarin and paste it into the project on the Visual Studio side, the class works fine. There's a few variations of this error depending how I structure things, but this one seems to be the root cause.</p> <p>Anyone have ideas why this library isn't working cross platform any more? Did something change with IXmlSerializable in the latest versions of Xamarin?</p>
 

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