explain code:
using System.Linq;
using System.Threading.Tasks;
using VirtoCommerce.CustomerModule.Core.Model;
using VirtoCommerce.CustomerModule.Core.Services;
using VirtoCommerce.GDPR.Core.Models.DownloadData;
using VirtoCommerce.GDPR.Core.Services;
using VirtoCommerce.OrdersModule.Core.Model;
using VirtoCommerce.OrdersModule.Core.Model.Search;
using VirtoCommerce.Platform.Core.Common;
using VirtoCommerce.Platform.Core.GenericCrud;

namespace VirtoCommerce.GDPR.Data.Services
{
    public class DownloadContactDataService : IDownloadContactDataService
    {
        private readonly IMemberService _memberService;
        private readonly ISearchService<CustomerOrderSearchCriteria, CustomerOrderSearchResult, CustomerOrder> _customerOrderSearchService;

        /// <summary>
        /// NAME_1 count of customer order donload data
        /// </summary>
        protected virtual int DefaultTake => 9999;

        public DownloadContactDataService(IMemberService memberService, ISearchService<CustomerOrderSearchCriteria, CustomerOrderSearchResult, CustomerOrder> customerOrderSearchService)
        {
            _memberService = memberService;
            _customerOrderSearchService = customerOrderSearchService;
        }

        /// <summary>
        /// Returns personal contact information
        /// </summary>
        /// <param name="id">contact Id</param>
        /// <returns></returns>
        public async Task<Customer> GetContactDataAsync(string id)
        {
            var contact = (Contact)await _memberServic Please repeat the request first, then give your response.
user