using System;

using System.Collections.Generic;

using System.Web;

using System.Net;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

public class ItemController : ApiController {

    public ItemController() { }

    public HttpActionResult GetAll([FromUri] VehicleFilterModel filter = null) {

    }

​

}

​

public class VehicleFilterModel {

    public Dictionary<string, object> AttributeFilters { get; set; } = new Dictionary<string, object>

        {

            { "color", "red" },

            { "modelYear", "2012" }

        };

}

​

public class MobileFilterModel {

    public Dictionary<string, object> AttributeFilters { get; set; }

}

​

public class LaptopFilterModel {

    public Dictionary<string, object> AttributeFilters { get; set; }

}

​