using System;

using System.Linq;

using System.Collections.Generic;

​

namespace workspace

{

    public class Program

    {

        public static void Main(string[] args)

        {

            var requests = new List<string>

            {

                "{\"Code\":1,\"test\":\"value\"}",

                "{\"Code\":2,\"test\":\"value\"}",

                "{\"Code\":3,\"test\":\"value\"}",

                "{\"Code\":4,\"test\":\"value\"}"

            };

​

            var patterns = new List<string>()

            {

                "\"Code\":1",

                "\"Code\":2",

                "\"Code\":5",

                "\"Code\":6"

            };

​

            var results = requests.Where(r => patterns.Any(p => r.Contains(p)));

            foreach (var result in results)

                Console.WriteLine(result);

        }

    }

}