using System;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

var json = @"{

    ""range"": [

        { ""num"": 0 },

        { ""num"": 1 },

        { ""num"": 2 },

        { ""num"": 3 },

        { ""num"": 4 },

        { ""num"": 5 },

        { ""num"": 6 },

        { ""num"": 7 },

        { ""num"": 8 },

        { ""num"": 9 }

    ],

    ""friends"": [

      {

        ""id"": 0,

        ""name"": ""Christian Cruz""

      },

      {

        ""id"": 1,

        ""name"": ""Hunter Moon""

      },

      {

        ""id"": 2,

        ""name"": ""Holden Gentry""

      }

    ]

}";

JObject obj = JObject.Parse(json);

foreach (JProperty prop in obj.Children())

{

    Console.WriteLine(prop.Name);

}

​

    }

}