using System;
public class Program
{
public static void Main()
var stringContent = "{}";
Newtonsoft.Json.Linq.JObject content = Newtonsoft.Json.Linq.JObject.Parse(stringContent);
if (content.ContainsKey("Test"))
//continue;
}
content.Add(new Newtonsoft.Json.Linq.JProperty("Test", "blah blah"));
//content.Add(("Test2", "blah blah"));
Console.WriteLine(content.ToString(Newtonsoft.Json.Formatting.Indented));
Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(content, Newtonsoft.Json.Formatting.Indented));