title: how to set default value to null for datetime variable in Json
body: <p>i use a json and the class definition is described below</p>
  
  <p>how do i set a default value of null for </p>
  
  <blockquote>
  <pre><code>[JsonProperty("Time2ATR")]
     public DateTime time2atr { get; set; }
  </code></pre>
  </blockquote>
  
  <p>so i dont get a default value of "0001-01-01T00:00:00" if i dont assign any value to it?</p>
  
  <blockquote>
    <p>full code and datasample below</p>
  </blockquote>
  
  <pre><code> using Newtonsoft.Json;
  // This namespace holds all indicators and is required. Do not change it.
  namespace NinjaTrader.STSClasses
  {
      /// &lt;summary&gt;
      /// This file holds all user defined indicator methods.
      /// &lt;/summary&gt;
     public class STSmyTrade
      {
          [JsonProperty("direction")]
          public string direction { get; set; }
  
          [JsonProperty("entryprice")]
          public double entry { get; set; }
  
          [JsonProperty("exitprice")]
          public double exit { get; set; }
  
          [JsonProperty("potentialtarget")]
          public double potentialtarget { get; set; }
  
          [JsonProperty("entrytime")]
          public DateTime entrytime { get; set; }
  
          [JsonProperty("exittime")]
          public DateTime exittime { get; set; }
  
          [JsonProperty("maxfavourable")]
          public double mfe { get; set; }
  
          [JsonProperty("maxagainst")]
          public double mae { get; set; }
  
  
          [JsonProperty("maxagainst1ATR")]
          public double mae1atr { get; set; }
  
          [JsonProperty("Time1ATR")]
          public DateTime time1atr { get; set; }
  
          [JsonProperty("maxagainst2ATR")]
          public double mae2atr { get; set; }
          [JsonProperty("Time2ATR")]
         public DateTime time2atr { get; set; }
  
          [JsonProperty("gains")]
          public double gains { get; set; }
  
          [JsonProperty("signal")]
          public string signal { get; set; }
  
          [JsonProperty("instrument")]
          public string instrument { get; set; }
  
          [JsonProperty("account")]
          public string account { get; set; }
           [JsonProperty("quantity")]
          public int quantity { get; set; }
           [JsonProperty("hitedge")]
          public bool hitedge { get; set; }
           [JsonProperty("RealizedProfitLoss")]
          public double RealizedProfitLoss { get; set; }
          [JsonProperty("CashValue")]
          public double CashValue { get; set; }
          [JsonProperty("BuyingPower")]
          public double BuyingPower { get; set; }
      }
  }
  
      {
        "direction": "Long",
        "entryprice": 1.13211,
        "exitprice": 1.13197,
        "potentialtarget": 0.00025,
        "entrytime": "2016-08-22T13:46:31.7459655-04:00",
        "exittime": "2016-08-22T15:46:22.3955682-04:00",
        "maxfavourable": 0.00055,
        "maxagainst": -0.00035,
        "maxagainst1ATR": -0.00035,
        "Time1ATR": "0001-01-01T00:00:00",
        "maxagainst2ATR": -0.00035,
        "Time2ATR": "0001-01-01T00:00:00",
        "gains": -0.00015,
        "signal": "EnterLongBounce",
        "instrument": "$EURUSD",
        "account": "InteractiveBrokersindicatorbased",
        "quantity": 1,
        "hitedge": false,
        "RealizedProfitLoss": 0.0,
        "CashValue": 0.0,
        "BuyingPower": 0.0
      }');
  </code></pre>