elasticsearch-net: DateAttribute can't mapping

NEST/Elasticsearch.Net version:

Elasticsearch version:

Description of the problem including expected versus actual behavior:

Steps to reproduce: 1. 2. 3.

Provide ConnectionSettings (if relevant):

Provide DebugInformation (if relevant):

Describe the feature: if I use DateAttribute and set up format their will have an error for example [ElasticsearchType(Name = “esmodel”, IdProperty = “id”)] public class ESModel { [Number(Name = “id”)] public int Id { set; get; } [Text(Name = “name”)] public string Name { set; get; } [Date(Name = “birthday”,Format = “yyyy-MM-dd HH:mm:ss”)] public DateTime? Birthday { set; get; } } ESModel es = new ESModel(); es.Id = 1; es.Name = “22”; es.Birthday =DateTime.Now; client.IndexDocument(es);