public VkCollection<Document> Get(int? count = null, int? offset = null, long? ownerId = null, DocFilter? filter = null) { VkErrors.ThrowIfNumberIsNegative(() => count); VkErrors.ThrowIfNumberIsNegative(() => offset); var parameters = new VkParameters { { "count", count }, { "offset", offset }, { "owner_id", ownerId }, { "type", filter } }; return _vk.Call("docs.get", parameters).ToVkCollectionOf<Document>(r => r); }