Create a data stream index template using NEST for Elastic Search

CreateElasticSearchDataStreamTest.cs

using System;
using Elasticsearch.Net;
using Nest;
using NUnit.Framework;

public class CreateDataStreamTest
{
    [Test]
    public void ShouldCreateDataStreamTemplate()
    {
        var client = new ElasticClient(new Uri("http://localhost:9200/"));
        var v = "somename";

        var response = PutDataStreamTemplate(client, v);

        Assert.False(response.TryGetServerError(out var serverError) && serverError.Status > 0, "Error {0}", serverError);
    }

    private static StringResponse PutDataStreamTemplate(ElasticClient client, string templateName)
    {
        var typeMappingDescriptor = new TypeMappingDescriptor<MyDocument>().AutoMap();

        var response = client.LowLevel.Indices.PutTemplateV2ForAll<StringResponse>($"{templateName}_data_stream",
            PostData.Serializable(new
            {
                index_patterns = new[] {$"{templateName}*"},
                data_stream = new { },
                template = new
                {
                    mappings = typeMappingDescriptor
                }
            }));
        return response;
    }

    public class MyDocument
    {
        [Date(Name = "@timestamp")] public DateTime Timestamp { get; set; }

        [Keyword] public string Code { get; set; }

        public int SortOrder { get; set; }
    }
}