Query and/or access object property

[styxtb1598 (David)]

I'm very new to ES and using the API for searching. I have an set of logs that have an object's properties

In my c# query, I am trying to access the fields.ui.Message field. How can I do that? I get the top level stuff (ID, messageTemplate, etc) and a Fields object. Below is the search itself.

var searchResponse = await _client.SearchAsync<TaskLog>(s => s
            .Source(sf => sf
               .Includes(i => i
                  .Fields("*.ui.Message*")
               )
            )
          .Index(_taskLogConfig.Index)
          .Size(_taskLogConfig.RetrieveCount)
          .Query(q => q
              .QueryString(qs => qs
                  .Fields(f => f.Field("fields.ui.TaskId")).Query(request.TaskId.ToString())
              )
          )
        .Sort(sa => sa.Descending(u => u.Timestamp)), cancellationToken
      );