using System;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

​

        [

            {

                ""faceId"": ""d9828616-b702-4f9b-9d7b-30eb3f0705e4"",

                ""faceRectangle"": {

                    ""top"": 26,

                    ""left"": 71,

                    ""width"": 321,

                    ""height"": 321

                },

                ""faceAttributes"": {

                    ""smile"": 0.007,

                    ""headPose"": {

                        ""pitch"": -9.8,

                        ""roll"": 4.6,

                        ""yaw"": 26.6

                    },

                    ""gender"": ""female"",

                    ""age"": 22,

                    ""facialHair"": {

                        ""moustache"": 0,

                        ""beard"": 0,

                        ""sideburns"": 0

                    },

                    ""glasses"": ""ReadingGlasses"",

                    ""emotion"": {

                        ""anger"": 0.001,

                        ""contempt"": 0,

                        ""disgust"": 0.001,

                        ""fear"": 0.058,

                        ""happiness"": 0.007,

                        ""neutral"": 0.25,

                        ""sadness"": 0.032,

                        ""surprise"": 0.651

                    }

                }

            }

        ]

​

        ";

        JArray a = JArray.Parse(json);  

        foreach (JObject o in a.Children<JObject>())

        {

            foreach (JProperty p in o.Properties())

            {

                string property = p.Name;

                Console.WriteLine(property);

            }

        }

    }

}