var elasticUri = new Uri("http://localhost:9200/cmstest/zdsf");

var loggerConfig = new LoggerConfiguration()
                .WriteTo.Elasticsearch(new ElasticsearchSinkOptions(elasticUri)
                {
                    AutoRegisterTemplate = true
                });

zdsf z = new zdsf();

z.filedate = DateTime.Now;
z.filename = "File2";

var logger = loggerConfig.CreateLogger();

var jsonString = new JavaScriptSerializer().Serialize(z);

logger.Error(jsonString);