Can you clear objects while code still running?

Question

I have some JSON that I deserialize by doing like:

 

Rootobject rootObject = JsonConvert.DeserializeObject(rawJSON);

 

That gets put into things like:

public class Rootobject
{
public Result result { get; set; }
public bool success { get; set; }
}
public class Result
{
public string title { get; set; }
public Datum[] data { get; set; }
public int total { get; set; }
}
public class Datum
{
public string type { get; set; }
public string title { get; set; }
public string series_title { get; set; }
public string label { get; set; }
public string content_id { get; set; }
public string airdate { get; set; }
public long airdate_ts { get; set; }
public DateTime airdate_iso { get; set; }
public string expiredate_raw { get; set; }

Everything working great. That said, I want to now run

 

Rootobject rootObject = JsonConvert.DeserializeObject(rawJSON);

 

again with a different set of JSON data. Basically a different feed but the exact same layout. Will all the above class objects still have the old data in it and when I loop thru that data will just be appended to it? If so is there a way to clear all values before looping thru the second process without creating two programs that run separately?