custom uri typeconvert to string for ElasticSearch indexing

elasticconfig.cs

      var elasticSearchConnectionSettings = new ConnectionSettings(new Uri("http://127.0.0.1:9200")
        .SetDefaultIndex("my-index")
        .SetTimeout(5 * 1000)
        .AddContractJsonConverters(
          (t) => t == typeof(Uri) ? new UriJsonConverter() : null
        );

UriJsonTypeConverter.cs

namespace Domain.TypeConverters
{
  using System;
  using Newtonsoft.Json;

  /// <summary>
  /// Converter for converting Uri to String and vica versa
  /// </summary>
  /// <remarks>
  /// Code originated from http://stackoverflow.com/a/8087049/106909
  /// </remarks>
  public sealed class UriJsonConverter : JsonConverter
  {
    /// <summary>
    /// Determines whether this instance can convert the specified object type.
    /// </summary>
    /// <param name="objectType"></param>
    /// <returns></returns>
    public override bool CanConvert(Type objectType)
    {
      return objectType == typeof(Uri);
    }

    /// <summary>
    /// Reads the JSON representation of the object.
    /// </summary>
    /// <param name="reader"></param>
    /// <param name="objectType"></param>
    /// <param name="existingValue"></param>
    /// <param name="serializer"></param>
    /// <returns></returns>
    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
      if (reader.TokenType == JsonToken.String)
        return new Uri((string)reader.Value);

      if (reader.TokenType == JsonToken.Null)
        return null;

      throw new InvalidOperationException("Unhandled case for UriConverter. Check to see if this converter has been applied to the wrong serialization type.");
    }

    /// <summary>
    /// Writes the JSON representation of the object.
    /// </summary>
    /// <param name="writer"></param>
    /// <param name="value"></param>
    /// <param name="serializer"></param>
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
      if (null == value)
      {
        writer.WriteNull();
        return;
      }

      var uriValue = value as Uri;
      if (uriValue != null)
      {
        writer.WriteValue(uriValue.OriginalString);
        return;
      }

      throw new InvalidOperationException("Unhandled case for UriConverter. Check to see if this converter has been applied to the wrong serialization type.");
    }
  }
}