using System;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        var jsonEnpoint = new {

            name = "VariableEndpointName",

            status = new[] {

                new {

                    id = 0,

                    }

                },

            service_profile = new[] {

                new {

                    id = 18246,

                    }

                },  

            tariff_profile = new[] {

                new {

                    id = 17570,

                    }

                },

            sim = new[] {

                new {

                    id = "VariableSim",

                    activate = "variableActivate"

                    }

                }

        };

        var json = JsonConvert.SerializeObject(jsonEnpoint, Formatting.Indented);

        var jsonFinal = json.Replace("[",string.Empty).Replace("]",string.Empty);

        Console.WriteLine(jsonFinal);

​

    }

}