c# - Get Datetime local format

Question

When I post a datetime value to my web API I get different results and I want to get datetime in local format

MyViewModel :

public class MyViewModel 
{
    public DateTime Time { get; set; }
}

I post json like this

{ "Time": "2020-09-08T04:00:00.000Z" }

to api/Values

[RoutePrefix("api/Values")]
public class ValuesController: ApiController 
{
    // POST api/values
    public object Post(MyViewModel model) 
    {
        return Newtonsoft.Json.JsonConvert.SerializeObject(model);
    }
}

the result in the same format is UTC

{\"Time\": \"2020-09-08T04:00:00Z\"}

---

But when I post the same Json to HomeController

public class HomeController: Controller 
{
    public object Post(MyViewModel model) 
    {
        return Newtonsoft.Json.JsonConvert.SerializeObject(model);
    }
}

the result is in local format like this

{ "Time":"2020-09-08T07:00:00+03:00" }

I want result to be in local format like HomeController

How can i implement it ?