using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var json = "[{\"key\":\"key1\",\"value\":\"val1\"},{\"key\":\"key2\",\"value\":\"val2\"}]";

        var result = JsonConvert.DeserializeObject<List<KeyValuePair<string,string>>>(json);

        foreach(var r in result)

        {

            Console.WriteLine("Key: {0} | Value: {1}", r.Key, r.Value);

        }

    }

}