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    <p>I know this has been answered before, but since I have a very concise way (code) for doing IDictionary serialization with the DataContractSerializer class (used by WCF, but could and should be used anywhere) I couldn't resist contributing it here:</p> <pre><code>public static class SerializationExtensions { public static string Serialize&lt;T&gt;(this T obj) { var serializer = new DataContractSerializer(obj.GetType()); using (var writer = new StringWriter()) using (var stm = new XmlTextWriter(writer)) { serializer.WriteObject(stm, obj); return writer.ToString(); } } public static T Deserialize&lt;T&gt;(this string serialized) { var serializer = new DataContractSerializer(typeof(T)); using (var reader = new StringReader(serialized)) using (var stm = new XmlTextReader(reader)) { return (T)serializer.ReadObject(stm); } } } </code></pre> <p>This works perfectly in .NET 4 and should also work in .NET 3.5, although I didn't test it yet. </p> <p><strong>UPDATE:</strong> It <strong>doesn't</strong> work in .NET Compact Framework (not even NETCF 3.7 for Windows Phone 7) as the <code>DataContractSerializer</code> is not supported!</p> <p>I did the streaming to string because it was more convenient to me, although I could have introduced a lower-level serialization to Stream and then used it to serialize to strings, but I tend to generalize only when needed (just like premature optimization is evil, so it is premature generalization...)</p> <p>Usage is very simple:</p> <pre><code>// dictionary to serialize to string Dictionary&lt;string, object&gt; myDict = new Dictionary&lt;string, object&gt;(); // add items to the dictionary... myDict.Add(...); // serialization is straight-forward string serialized = myDict.Serialize(); ... // deserialization is just as simple Dictionary&lt;string, object&gt; myDictCopy = serialized.Deserialize&lt;Dictionary&lt;string,object&gt;&gt;(); </code></pre> <p>myDictCopy will be a verbatim copy of myDict. </p> <p>You'll also notice that the generic methods provided will be able to serialize any type (to the best of my knowledge) since it is not limited to IDictionary interfaces, it can be really any generic type T.</p> <p>Hope it helps someone out there!</p>
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    1. POWhy isn't there an XML-serializable dictionary in .NET?
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    1. COWorks great! To other developers: You'll need to add a project reference for `System.Runtime.Serialization` if you don't already have one, but it is available in the .NET 4.0 Client Profile.
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    2. COIt did not work with Windows Phone 8 SDK targeting Windows Phone 7.5 (which is Silverlight 3).
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    3. CO@Adarsha Per the DataContractSerializer documentation it supports the following platforms: Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)... It doesn't mention the phone SDK... The Windows Phone 7 uses .NET Compact Framework 3.7, thus no DataContractSerializer :-( I've updated the post accordingly so people do not loose time figuring out what didn't work! Thanks Adarsha!
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