using System;

using System.Linq;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

            [

              {

                ""contentUri"": ""https://somewhere.com/aGuid1"",

                ""contentId"": ""2""

              },

              {

                ""contentUri"": ""https://somewhere.com/aGuid2"",

                ""contentId"": ""3""

              },

              {

                ""contentUri"": ""https://somewhere.com/aGuid3"",

                ""contentId"": ""4""

              }

            ]";

        JArray array = JArray.Parse(json);

        foreach (JObject child in array)

        {

            Console.WriteLine("contentUri: " + (string)child["contentUri"]);

            Console.WriteLine("contentId: " + (string)child["contentId"]);

        }

        Console.WriteLine();

        foreach (JToken uri in array.SelectTokens("[*].contentUri"))

        {

            Console.WriteLine(uri);

        }

        Console.WriteLine();

        foreach (string uri in array.Select(t => (string)t["contentUri"]))

        {

            Console.WriteLine(uri);

        }

    }

}