Datatime custom format

public class CustomDateTimeConverter : IsoDateTimeConverter
{
    public CustomDateTimeConverter()
    {
        base.DateTimeFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ssZ";
    }
}

using Newtonsoft.Json;

    [JsonConverter(typeof(CustomDateTimeConverter))]
    public DateTime? TimestampTare { get; set; }