Creates JTokenWriter JToken

This sample creates a Argon.JTokenWriter from a Argon.JToken.

var o = new JObject
{
    {"name1", "value1"},
    {"name2", "value2"}
};

var writer = o.CreateWriter();
writer.WritePropertyName("name3");
writer.WriteStartArray();
writer.WriteValue(1);
writer.WriteValue(2);
writer.WriteEndArray();

Console.WriteLine(o.ToString());
// {
//   "name1": "value1",
//   "name2": "value2",
//   "name3": [
//     1,
//     2
//   ]
// }

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