Entity framework nested collection filtering

EFNestedCollections.cs

public async Task<IEnumerable<Conversation>> GetUserConversations(string userId)
{
	var temp = await conversationRepo.GetDbSet()
		.Where(x => x.DeletedBy != userId)
		.Where(x => x.SellerId == userId || x.BuyerId == userId)
		.Select(x => new 
		{
			conversation = x,
			buyer = x.Buyer,
			seller = x.Seller,
			ad = x.Ad,
			images = x.Ad.Images,
			messages = x.Messages
				.OrderByDescending(m => m.SentAt)
				.Take(AppConstants.CHAT_PAGE_SIZE)
				.OrderBy(m => m.SentAt),
			newMessagesCount = x.Messages.Where(m => !m.Read && m.SenderId != userId).Count()
		}).ToListAsync();

	IEnumerable<Conversation> conversations = temp
		.Select(x => 
		{
			var conversation = x.conversation;
			conversation.NewMessagesCount = x.newMessagesCount;
			return conversation; 
		})
		.OrderByDescending(x => x.Messages.LastOrDefault().SentAt)
		.ToList<Conversation>();	

	return conversations;
}