public override void CreateNewOutputRows()
{
    String jsonFileContent = File.ReadAllText(@"C:UserstngoFileFile1.json");

    JavaScriptSerializer js = new JavaScriptSerializer();

    List<IGData> igdatas = js.Deserialize<List<IGData>>(jsonFileContent);

    foreach (IGData igdata in igdatas)

    {

        Output0Buffer.AddRow();

        Output0Buffer.piececount = igdata.piececount;

        Output0Buffer.wgt = igdata.wgt;
    }
}