//Controller
	[ValidateAntiForgeryToken]
        [HttpPost]
        public ActionResult Filter(FormCollection collection)
        {

            SearchFilterModel filter = new SearchFilterModel();
            TryUpdateModel(filter, collection);
            Request["BodyTypes"].ToArray();
            Session["filter"] =  filter;
            return RedirectToAction("List", new { page = 1 });

        }

//view
@using (Html.BeginForm("Filter", "Search"))
{
    @Html.AntiForgeryToken()

    <span>Idade ente @Html.TextBox("AgeMin", String.Empty, new { style = "width: 20px;", maxlength = "2" })
        e @Html.TextBox("AgeMax", String.Empty, new { style = "width: 20px;", maxlength = "2" })</span><br />

    <span>Tipo fisico: @Html.CheckBox("BodyTypes", new { value = "41" })Magro</span>
    <span>@Html.CheckBox("BodyTypes", new { value = "42" })Atlético</span>
    <span>@Html.CheckBox("BodyTypes", new { value = "43" })Na média</span>
    <span>@Html.CheckBox("BodyTypes", new { value = "44" })Um pouco acima do peso</span>
    <br />

    <span>Estado civil: @Html.CheckBox("Relationships", new { value = "1" })Solteiro</span>
    <span>@Html.CheckBox("Relationships", new { value = "2" })Separado</span>
    <span>@Html.CheckBox("Relationships", new { value = "3" })Divorciado</span>
    <span>@Html.CheckBox("Relationships", new { value = "4" })Viúvo</span>
    <span>@Html.CheckBox("Relationships", new { value = "5" })Digo depois</span><br />

    <span>@Html.SubmitButton("Pesquisar", "Pesquisar")</span>
}

//Objeto

public List<int> Relationships { get; set; }
public List<int> BodyTypes { get; set; }