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copied!<p>Not without using another serialization library or implementing serialization yourself. Neither Hashtable or Dictionary are serializable out of the box in .NET. There is an implementation of a SerializableDictionary <a href="http://www.dacris.com/blog/2010/07/31/c-serializable-dictionary-a-working-example/" rel="noreferrer">here</a> that does both XML and binary serialization.</p> <p>Here is the code from the link (Copyright (c) Dacris Software Inc. MIT license):</p> <pre class="lang-cs prettyprint-override"><code>using System; using System.Runtime.Serialization; using System.Xml; using System.Xml.Serialization; using System.Collections.Generic; using System.Text; [Serializable()] public class SerializableDictionary<TKey, TVal> : Dictionary<TKey, TVal>, IXmlSerializable, ISerializable { #region Constants private const string DictionaryNodeName = "Dictionary"; private const string ItemNodeName = "Item"; private const string KeyNodeName = "Key"; private const string ValueNodeName = "Value"; #endregion #region Constructors public SerializableDictionary() { } public SerializableDictionary(IDictionary<TKey, TVal> dictionary) : base(dictionary) { } public SerializableDictionary(IEqualityComparer<TKey> comparer) : base(comparer) { } public SerializableDictionary(int capacity) : base(capacity) { } public SerializableDictionary(IDictionary<TKey, TVal> dictionary, IEqualityComparer<TKey> comparer) : base(dictionary, comparer) { } public SerializableDictionary(int capacity, IEqualityComparer<TKey> comparer) : base(capacity, comparer) { } #endregion #region ISerializable Members protected SerializableDictionary(SerializationInfo info, StreamingContext context) { int itemCount = info.GetInt32("ItemCount"); for (int i = 0; i < itemCount; i++) { KeyValuePair<TKey, TVal> kvp = (KeyValuePair<TKey, TVal>)info.GetValue(String.Format("Item{0}", i), typeof(KeyValuePair<TKey, TVal>)); this.Add(kvp.Key, kvp.Value); } } void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { info.AddValue("ItemCount", this.Count); int itemIdx = 0; foreach (KeyValuePair<TKey, TVal> kvp in this) { info.AddValue(String.Format("Item{0}", itemIdx), kvp, typeof(KeyValuePair<TKey, TVal>)); itemIdx++; } } #endregion #region IXmlSerializable Members void IXmlSerializable.WriteXml(System.Xml.XmlWriter writer) { //writer.WriteStartElement(DictionaryNodeName); foreach (KeyValuePair<TKey, TVal> kvp in this) { writer.WriteStartElement(ItemNodeName); writer.WriteStartElement(KeyNodeName); KeySerializer.Serialize(writer, kvp.Key); writer.WriteEndElement(); writer.WriteStartElement(ValueNodeName); ValueSerializer.Serialize(writer, kvp.Value); writer.WriteEndElement(); writer.WriteEndElement(); } //writer.WriteEndElement(); } void IXmlSerializable.ReadXml(System.Xml.XmlReader reader) { if (reader.IsEmptyElement) { return; } // Move past container if (!reader.Read()) { throw new XmlException("Error in Deserialization of Dictionary"); } //reader.ReadStartElement(DictionaryNodeName); while (reader.NodeType != XmlNodeType.EndElement) { reader.ReadStartElement(ItemNodeName); reader.ReadStartElement(KeyNodeName); TKey key = (TKey)KeySerializer.Deserialize(reader); reader.ReadEndElement(); reader.ReadStartElement(ValueNodeName); TVal value = (TVal)ValueSerializer.Deserialize(reader); reader.ReadEndElement(); reader.ReadEndElement(); this.Add(key, value); reader.MoveToContent(); } //reader.ReadEndElement(); reader.ReadEndElement(); // Read End Element to close Read of containing node } System.Xml.Schema.XmlSchema IXmlSerializable.GetSchema() { return null; } #endregion #region Private Properties protected XmlSerializer ValueSerializer { get { if (valueSerializer == null) { valueSerializer = new XmlSerializer(typeof(TVal)); } return valueSerializer; } } private XmlSerializer KeySerializer { get { if (keySerializer == null) { keySerializer = new XmlSerializer(typeof(TKey)); } return keySerializer; } } #endregion #region Private Members private XmlSerializer keySerializer = null; private XmlSerializer valueSerializer = null; #endregion } </code></pre>

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