Creating an anonymous object who must have the dot in Key name and put it inside another anonymous object

Question

I'm making a JSON body for an elasticsearch query.

I have this dynamic:

var hlBodyText = new
{
  bodyText = new { }
};

But there's a case in which the name must be bodyText.exact = new { }, but obviously I'm not allowed to do it and return the error message:

Invalid anonymous type member declarator. Anonymous type members must be declared with a member assignment, simple name or member access.

There's a way to make that value name with the dot char?

EDIT

Furthermore, I have to put this object inside another object, like this:

var fieldsInner = new
{
  hlBodyText.bodyText
};

What could be the best way to get this result but with the property name set with the dot?

EDIT #2

I created a class with all my parameters beacause I thought the JsonProperty attribute could help me.

internal class ElasticSearchHighlightsModel
{
  [JsonProperty("bodyText")]
  public object bodyText { get; set; }
  [JsonProperty("title")]
  public object title { get; set; }
  [JsonProperty("shortDescription")]
  public object shortDescription { get; set; }

  [JsonProperty("bodyText.exact")]
  public object bodyTextExact { get; set; }
  [JsonProperty("title.exact")]
  public object titleExact { get; set; }
  [JsonProperty("shortDescription.exact")]
  public object shortDescriptionExact { get; set; }
}

then in my method i have a condition for which I have to use some params or others.

// ...some code...
else
{
  var hlBodyText = new ElasticSearchHighlightsModel() { bodyTextExact = new { } };
  var hlTitle = new ElasticSearchHighlightsModel() { titleExact = new { } };
  var hlShortDescription = new ElasticSearchHighlightsModel() { shortDescriptionExact = new { } };

  var fieldsInner = new
  {
    hlBodyText.bodyTextExact,
    hlTitle.titleExact,
    hlShortDescription.shortDescriptionExact,
  };

  var fieldsContainer = new
  {
    pre_tags = preTags,
    post_tags = postTags,
    fields = fieldsInner,
  };
  return fieldsContainer;
}

But the fieldsInner object have the parameter names (bodyTextExact, titleExact etc...), not the JsonProperty attribute ones.

Answer 1

Solved using Dictionary, then passed it inside an anonymous type obj:

IDictionary highlitsFieldsContainer = new Dictionary<string, object>();
// ... some code
highlitsFieldsContainer["bodyText.exact"] = new { };
highlitsFieldsContainer["title.exact"] = new { };
var fieldsContainer = new
{
  fields = highlitsFieldsContainer,
};

// OUTPUT: fieldsContainer = { fields = { bodyText.exact = {}, title.exact = {} } }

And used a RouteValueDictionary class to read that values when elasticsearch send his response.

RouteValueDictionary _res = new RouteValueDictionary(dynamicResponse.highlights);
if (_res["shortDescription.exact"] != null)
{ 
  // ...
}