asp.net web api - Filter Child Property OData and ASPNET WebApi -

i'm facing problem. i've googled lot , searched in here too, couldn't find answer problem.

i have aspnet web api returns json. also, add microsoft.data.odata nuget allow odata queries.

it's working fine simple cases, now, need apply filter in child collection.

sample:

{"total":1,"products":[{"id":20289,"brandid":5,"categoryid":1,"price":12.0,"name":"carolina herrera","description":"ch","productcode":"asd2334","picture":null,"contentpackaging":"liquid","brandname":"carolina herrera","brandpicture":null,"generic":true}, {"id":20290,"brandid":5,"categoryid":1,"price":25.0,"name":"carolina herrera 2","description":"ch 2","productcode":"asd999","picture":null,"contentpackaging":"liquid","brandname":"carolina herrera","brandpicture":null,"generic":true} ]} 

i want query in products collection price greater 20 example.

i've tried this:

http://domain.com/api/$filter=products/price gt 20 

but didn't work.

is possible that?

code:

//controller public iqueryable<viewmodelproducts> getproducts() {     var products = _repository.findby(x=>x.generic && x.status).tolist();      return products.count == 0 ? new list<viewmodelproducts>().asqueryable() : products.asqueryable(); }  //model public class viewmodelproducts {     public int total { get; set; }     public iqueryable<products> products { get; set; } }  public class products {     public int id { get; set; }     public int brandid { get; set; }     public int categoryid { get; set; }     public decimal price { get; set; }     public string name { get; set; }     public string description { get; set; }     public string productcode { get; set; }     public string picture { get; set; }     public string contentpackaging { get; set; }     public string brandname { get; set; }     public string brandpicture { get; set; }     public bool generic { get; set; } }