Make JavaScriptSerializer serialize ExpandoObject less like a sociopath.

ExpandoSerializer.cs

void Main()
{
	dynamic foo = new ExpandoObject();
	
	foo.name = "Conery";
	foo.company = "TekPub";
	foo.today = DateTime.Now;
	
	var jss = new JavaScriptSerializer();
	
	jss.RegisterConverters(new JavaScriptConverter[] { new ExpandoObjectConverter() });
	
	Console.Write(jss.Serialize(foo));
}

public class ExpandoObjectConverter : JavaScriptConverter
{
	public override IEnumerable<Type> SupportedTypes
	{
			get { return new ReadOnlyCollection<Type>(new List<Type>(new Type[] { typeof(ExpandoObject) })); }
	}

	public override IDictionary<string, object> Serialize(object obj, JavaScriptSerializer serializer)
	{
			ExpandoObject expando = (ExpandoObject)obj;

			if (expando != null)
			{
					// Create the representation.
					Dictionary<string, object> result = new Dictionary<string, object>();

					foreach (KeyValuePair<string, object> item in expando)
					{
						if (item.Value.GetType() == typeof(DateTime))
							result.Add(item.Key, ((DateTime)item.Value).ToShortDateString());
						else
							result.Add(item.Key, item.Value.ToString());
					}

					return result;
			}
			return new Dictionary<string, object>();
	}
	
	public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer)
	{
			return null;
	}	
}

This code is based on the example here on MSDN: http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptconverter.aspx