public static CategoryGroup FromJson(VkResponse response)
{
return new CategoryGroup
{
Id = response["id"],
Name = response["name"],
Subcategories = response["subcategories"].ToReadOnlyCollectionOf<CategoryGroup>(o => o),
PageCount = response["page_count"],
PagePreviews = response["page_previews"].ToReadOnlyCollectionOf<Group>(o => o)
};
}