using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

            { ""items"": [

               {

                ""name"": ""Cannonball"",

                ""store"": 5

              },

              {

                ""name"": ""Cannon base"",

                ""store"": 187500

              },

              {

                ""name"": ""Mithril platelegs (t)"",

                ""store"": 2600

              },

              {

                ""name"": ""Cannon stand"",

                ""store"": 187500

              },

              {

                ""name"": ""Cannon barrels"",

                ""store"": 187500

              },

              {

                ""name"": ""Cannon furnace"",

                ""store"": 187500

              } ]

            }";

​

        dynamic dict = JsonConvert.DeserializeObject(json); 

        dict = dict.SelectTokens("$.items[?(/fu/.test(@.name))]");

        Console.WriteLine(dict[0]);

    }

}

​