using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

​

public static class Program {

    public static void Main() {

        var createSubscriber = new {

            Code = "cliente03",

            Email = "nome@exemplo.com.br",

            FullName = "Nome Sobrenome",

            Cpf = "22222222222",

            Phone_Area_Code = "11",

            Phone_Number = "934343434",

            BirthDate_Day = "26",

            BirthDate_Month = "04",

            BirthDate_Year = "1980",

            Address = new Address {

                Street = "Rua Nome da Rua",

                StreetNumber = "100",

                Complement = "casa",

                District = "Nome do Bairro",

                City = "São Paulo",

                State = "SP",

                Country = "BRA",

                ZipCode = "05015010"

            },

            Billing_Info = new {

                Credit_Card = new {

                    Holder_Name = "Nome Completo",

                    Number = "4111111111111111",

                    Expiration_Month = "06",

                    Expiration_Year = "22"

                }

            }

        };

        string json = string.Empty;

        try {

            json = JsonConvert.SerializeObject(createSubscriber);

            JObject jObject = JObject.Parse(json);

            jObject["Address"]["streetNumber"].Rename("number");

            jObject["Address"]["zipCode"].Rename("zipcode");

            json = jObject.ToString();

        }

        catch(System.Exception ex) {

            throw ex;

        }

    }

​

    public static void Rename(this JToken token, string newName) {

        if (token == null) throw new ArgumentNullException("token", "Cannot rename a null token");

​

        JProperty property;

​

        if (token.Type == JTokenType.Property) {

            if (token.Parent == null) throw new InvalidOperationException("Cannot rename a property with no parent");

​

            property = (JProperty) token;

        }

        else {

            if (token.Parent == null || token.Parent.Type != JTokenType.Property) throw new InvalidOperationException("This token's parent is not a JProperty; cannot rename");

​

            property = (JProperty) token.Parent;

        }

​

        var newProperty = new JProperty(newName, property.Value);

        property.Replace(newProperty);

    }

}

​

public class Address

{

    [JsonProperty("streetNumber", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string StreetNumber { get; set; }

    [JsonProperty("street", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string Street { get; set; }

    [JsonProperty("city", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string City { get; set; }

    [JsonProperty("complement", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string Complement { get; set; }

    [JsonProperty("district", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string District { get; set; }

    [JsonProperty("zipCode", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string ZipCode { get; set; }

    [JsonProperty("state", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string State { get; set; }

    [JsonProperty("type", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string Type { get; set; }

    [JsonProperty("country", DefaultValueHandling = DefaultValueHandling.Ignore)]

    public string Country { get; set; }

}

​