<ArrayOfBook xmlns="http://schemas.datacontract.org/2004/07/WcfService5" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><Book><Abstract>Abstract_5000050</Abstract><Author>Author_5000050</Author><Comment>Comment_5000050</Comment><Content>Content_5000050</Content><ISBN>ISBN_5000050_92d5768b350d4d2e82616e3e233f42ee</ISBN><Id>5000050</Id><Name>Name_5000050</Name><Summary>Summary_5000050</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string><a:string>Tag_2</a:string><a:string>Tag_3</a:string><a:string>Tag_4</a:string><a:string>Tag_5</a:string></Tags><Title>Title_5000050</Title><Topic>Topic_5000050</Topic></Book><Book><Abstract>Abstract_5000051</Abstract><Author>Author_5000051</Author><Comment>Comment_5000051</Comment><Content>Content_5000051</Content><ISBN>ISBN_5000051_fd049961df5a402aa64227484a68946f</ISBN><Id>5000051</Id><Name>Name_5000051</Name><Summary>Summary_5000051</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string><a:string>Tag_2</a:string><a:string>Tag_3</a:string></Tags><Title>Title_5000051</Title><Topic>Topic_5000051</Topic></Book><Book><Abstract>Abstract_5000052</Abstract><Author>Author_5000052</Author><Comment>Comment_5000052</Comment><Content>Content_5000052</Content><ISBN>ISBN_5000052_72a7bb1c93f9472987ec215fc3139a02</ISBN><Id>5000052</Id><Name>Name_5000052</Name><Summary>Summary_5000052</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string><a:string>Tag_2</a:string><a:string>Tag_3</a:string></Tags><Title>Title_5000052</Title><Topic>Topic_5000052</Topic></Book><Book><Abstract>Abstract_5000053</Abstract><Author>Author_5000053</Author><Comment>Comment_5000053</Comment><Content>Content_5000053</Content><ISBN>ISBN_5000053_3d6694c01eea4e57b110965e1d2a634c</ISBN><Id>5000053</Id><Name>Name_5000053</Name><Summary>Summary_5000053</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string><a:string>Tag_2</a:string></Tags><Title>Title_5000053</Title><Topic>Topic_5000053</Topic></Book><Book><Abstract>Abstract_5000054</Abstract><Author>Author_5000054</Author><Comment>Comment_5000054</Comment><Content>Content_5000054</Content><ISBN>ISBN_5000054_c6b7d6f39b3f42af8a772960d5a85360</ISBN><Id>5000054</Id><Name>Name_5000054</Name><Summary>Summary_5000054</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string></Tags><Title>Title_5000054</Title><Topic>Topic_5000054</Topic></Book><Book><Abstract>Abstract_5000055</Abstract><Author>Author_5000055</Author><Comment>Comment_5000055</Comment><Content>Content_5000055</Content><ISBN>ISBN_5000055_62158a3eeac64fb3b03d86187e563ec8</ISBN><Id>5000055</Id><Name>Name_5000055</Name><Summary>Summary_5000055</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string></Tags><Title>Title_5000055</Title><Topic>Topic_5000055</Topic></Book><Book><Abstract>Abstract_5000056</Abstract><Author>Author_5000056</Author><Comment>Comment_5000056</Comment><Content>Content_5000056</Content><ISBN>ISBN_5000056_6e28c32d8aa248cb9e1c7383b9f0bf7a</ISBN><Id>5000056</Id><Name>Name_5000056</Name><Summary>Summary_5000056</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string></Tags><Title>Title_5000056</Title><Topic>Topic_5000056</Topic></Book><Book><Abstract>Abstract_5000057</Abstract><Author>Author_5000057</Author><Comment>Comment_5000057</Comment><Content>Content_5000057</Content><ISBN>ISBN_5000057_a2b828aa3535417e9594e992145fd212</ISBN><Id>5000057</Id><Name>Name_5000057</Name><Summary>Summary_5000057</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string><a:string>Tag_2</a:string><a:string>Tag_3</a:string><a:string>Tag_4</a:string></Tags><Title>Title_5000057</Title><Topic>Topic_5000057</Topic></Book><Book><Abstract>Abstract_5000058</Abstract><Author>Author_5000058</Author><Comment>Comment_5000058</Comment><Content>Content_5000058</Content><ISBN>ISBN_5000058_650d8cf2dba34bd3a61037d652243dd5</ISBN><Id>5000058</Id><Name>Name_5000058</Name><Summary>Summary_5000058</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string><a:string>Tag_2</a:string><a:string>Tag_3</a:string></Tags><Title>Title_5000058</Title><Topic>Topic_5000058</Topic></Book><Book><Abstract>Abstract_5000059</Abstract><Author>Author_5000059</Author><Comment>Comment_5000059</Comment><Content>Content_5000059</Content><ISBN>ISBN_5000059_746b87786a854839b2a32416a7e89590</ISBN><Id>5000059</Id><Name>Name_5000059</Name><Summary>Summary_5000059</Summary><Tags xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><a:string>Tag_0</a:string><a:string>Tag_1</a:string><a:string>Tag_2</a:string><a:string>Tag_3</a:string><a:string>Tag_4</a:string></Tags><Title>Title_5000059</Title><Topic>Topic_5000059</Topic></Book></ArrayOfBook>

using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(xmlStr)))
{
    var serializer = new DataContractSerializer(
        typeof(List<Book>),
        rootName: "ArrayOfBook",
        rootNamespace: "http://schemas.datacontract.org/2004/07/WcfService5"
    );
    var bookList = (List<Book>)serializer.ReadObject(ms);

    Application.Current?.Dispatcher?.Invoke(() =>
    {
        BooksCollection = new ObservableCollection<Book>(bookList ?? new List<Book>());
        MainTitle = $"{DateTime.Now},loaded {BooksCollection.Count} items," +
        $"FirstId:{BooksCollection?.FirstOrDefault()?.Id}," +
        $"LastId:{BooksCollection?.LastOrDefault()?.Id}";
    });
}

//WCF
//D:\C\WcfService5\WcfService5\IBookService.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using System.Text.Json;

namespace WcfService5
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IBookService" in both code and config file together.
    [ServiceContract]
    public interface IBookService
    {
        [OperationContract]
        [WebGet(UriTemplate="/getbookslist?cnt={cnt}")]
        List<Book> GetBooksList(int cnt);
    }

    [DataContract(Namespace = "http://schemas.datacontract.org/2004/07/WcfService5")]
    public class Book : ICloneable
    {
        [DataMember]
        public long Id { get; set; }
        [DataMember]
        public string Name { get; set; }
        [DataMember]
        public string ISBN { get; set; }
        [DataMember]
        public string Abstract { get; set; }
        [DataMember]
        public string Author { get; set; }
        [DataMember]
        public string Comment { get; set; }
        [DataMember]
        public string Content { get; set; }
        [DataMember]
        public string Summary { get; set; }
        [DataMember]
        public string Title { get; set; }
        [DataMember]
        public string Topic { get; set; }
        [DataMember]
        public List<string> Tags { get; set; }

        public object Clone()
        {
            return DeepClone();
        }

        public Book DeepClone()
        {
            string jsonStr = System.Text.Json.JsonSerializer.Serialize(this);
            Book bk = JsonSerializer.Deserialize<Book>(jsonStr);
            return bk;
        }
    }
}


//D:\C\WcfService5\WcfService5\BookService.svc.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Threading;

namespace WcfService5
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "BookService" in code, svc and config file together.
    // NOTE: In order to launch WCF Test Client for testing this service, please select BookService.svc or BookService.svc.cs at the Solution Explorer and start debugging.
    public class BookService : IBookService
    {
        private static long id = 0;
        private Random rnd = new Random();
        private (long, long) GetStartEnd(int cnt)
        {
            long end = Interlocked.Add(ref id, cnt);
            long start = end - cnt;
            return (start, end);
        }

        public List<Book> GetBooksList(int cnt)
        {
            List<Book> bksList=new List<Book>();
            var (start,end) = GetStartEnd(cnt); 
            for(long i=start; i<end; i++)
            {
                var tags = new List<string>();
                for(int j=0;j<rnd.Next(1,10);j++)
                {
                    tags.Add($"Tag_{j}");
                }
                bksList.Add(new Book()
                {
                    Id=i,
                    Name=$"Name_{i}",
                    Author=$"Author_{i}",
                    Abstract=$"Abstract_{i}",
                    Comment=$"Comment_{i}",
                    Content=$"Content_{i}",
                    ISBN=$"ISBN_{i}_{Guid.NewGuid():N}",
                    Summary=$"Summary_{i}",
                    Title=$"Title_{i}",
                    Topic=$"Topic_{i}",
                    Tags=tags
                });
            }
            return bksList;
        }
    }
}


//D:\C\WcfService5\WcfService5\Web.config
<?xml version="1.0"?>
<configuration>

    <appSettings>
        <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
    </appSettings>
    <system.web>
        <compilation debug="true" targetFramework="4.8" />
        <httpRuntime targetFramework="4.8"/>
    </system.web>
    <system.serviceModel>
        <bindings>
            <webHttpBinding>
                <binding name="BookServiceWebHttpBinding"
                          openTimeout="01:00:00"
                          closeTimeout="01:00:00"
                          sendTimeout="01:00:00"
                          receiveTimeout="01:00:00"
                          maxBufferPoolSize="2147483647"
                          maxBufferSize="2147483647"
                          maxReceivedMessageSize="2147483647">
                    <readerQuotas maxArrayLength="2147483647"
                                  maxBytesPerRead="2147483647"
                                  maxDepth="2147483647"
                                  maxNameTableCharCount="2147483647"
                                  maxStringContentLength="2147483647"/>
                    <security mode="None"/>
                </binding>
            </webHttpBinding>
        </bindings>
        <behaviors>
            <serviceBehaviors>
                <behavior name="BookServiceBehavior">
                    <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
                    <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
                    <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
                    <serviceDebug includeExceptionDetailInFaults="false"/>
                </behavior>
            </serviceBehaviors>
            <endpointBehaviors>
                <behavior name="BookServiceEndPointBehavior">
                    <webHttp/>
                </behavior>
            </endpointBehaviors>
        </behaviors>
        <protocolMapping>
            <add binding="basicHttpsBinding" scheme="https" />
        </protocolMapping>
        <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
        <services>
            <service name="WcfService5.BookService"
                     behaviorConfiguration="BookServiceBehavior">
                <endpoint address=""
                          binding="webHttpBinding"
                          contract="WcfService5.IBookService"
                          behaviorConfiguration="BookServiceEndPointBehavior"
                          bindingConfiguration="BookServiceWebHttpBinding"/>
            </service>
        </services>
    </system.serviceModel>
    <system.webServer>
        <modules runAllManagedModulesForAllRequests="true"/>
        <!--
        To browse web app root directory during debugging, set the value below to true.
        Set to false before deployment to avoid disclosing web app folder information.
      -->
        <directoryBrowse enabled="true"/>
    </system.webServer>

</configuration>

//WPF
<Window x:Class="WpfApp12.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp12"
        mc:Ignorable="d"
        Title="{Binding MainTitle}"
        WindowState="Maximized">
    <Window.DataContext>
        <local:MainVM/>
    </Window.DataContext>
    <Grid>
        <DataGrid ItemsSource="{Binding BooksCollection}"
                  VirtualizingPanel.IsVirtualizing="True"
                  VirtualizingPanel.VirtualizationMode="Recycling"
                  VirtualizingPanel.CacheLengthUnit="Item"
                  VirtualizingPanel.CacheLength="5,5"
                  ScrollViewer.CanContentScroll="True"
                  ScrollViewer.IsDeferredScrollingEnabled="True"
                  UseLayoutRounding="True"
                  SnapsToDevicePixels="True"
                  AutoGenerateColumns="True"
                  CanUserAddRows="True">
            <DataGrid.Resources>
                <Style TargetType="DataGridRow">
                    <Setter Property="FontSize" Value="30"/>
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="FontSize" Value="50"/>
                            <Setter Property="Foreground" Value="Red"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.Resources>
        </DataGrid>
    </Grid>
</Window>


using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Net.Http;
using System.Runtime.CompilerServices;
using System.Runtime.Serialization;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks.Dataflow;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp12
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            //DeepCloneDemo();
        }

        
        
    }

    public class MainVM : INotifyPropertyChanged
    {
        private readonly HttpClient client = new HttpClient();
        private string originalUrl = $"http://localhost:57987/BookService.svc/getbookslist?cnt=";
        private bool isLoading = false;

        public MainVM()
        {
            if(!DesignerProperties.GetIsInDesignMode(new DependencyObject()))
            {
                _ = FetchDataFromWCFRelentless();
            }
        }

        private async Task FetchDataFromWCFRelentless()
        {
            while(true)
            {
                await InitBooksCollectionAsync();
                await Task.Delay(10000);
            }
        }

        private async Task InitBooksCollectionAsync(int cnt=1000000)
        {
            if(isLoading)
            {
                return;
            }
            isLoading = true;
            Application.Current?.Dispatcher?.InvokeAsync(() =>
            {
                MainTitle = $"{DateTime.Now},loading...";
            },System.Windows.Threading.DispatcherPriority.Background);

            string url = $"{originalUrl}{cnt}";
            try
            {
                string xmlStr = await client.GetStringAsync(url);
                if(string.IsNullOrWhiteSpace(xmlStr))
                {
                    Application.Current?.Dispatcher.InvokeAsync(() =>
                    {
                        BooksCollection = new ObservableCollection<Book>();
                    },System.Windows.Threading.DispatcherPriority.Background);                    
                }
                using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(xmlStr)))
                {
                    var serializer = new DataContractSerializer(
                        typeof(List<Book>),
                        rootName: "ArrayOfBook",
                        rootNamespace: "http://schemas.datacontract.org/2004/07/WcfService5"
                    );
                    var bookList = (List<Book>)serializer.ReadObject(ms);

                    Application.Current?.Dispatcher?.Invoke(() =>
                    {
                        BooksCollection = new ObservableCollection<Book>(bookList ?? new List<Book>());
                        MainTitle = $"{DateTime.Now},loaded {BooksCollection.Count} items," +
                        $"FirstId:{BooksCollection?.FirstOrDefault()?.Id}," +
                        $"LastId:{BooksCollection?.LastOrDefault()?.Id}";
                    });
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex?.Message);
            }
            finally
            {
                isLoading = false;
            }
        }

        private string mainTitle = $"{DateTime.Now}";
        public string MainTitle
        {
            get
            {
                return mainTitle;
            }
            set
            {
                if(value!=mainTitle)
                {
                    mainTitle = value;
                    OnPropertyChanged();
                }
            }
        }

        private ObservableCollection<Book> booksCollection;
        public ObservableCollection<Book> BooksCollection
        {
            get
            {
                return booksCollection;
            }
            set
            {
                if(value!=booksCollection)
                {
                    booksCollection = value;
                    OnPropertyChanged();
                }
            }
        }

        public event PropertyChangedEventHandler? PropertyChanged;
        private void OnPropertyChanged([CallerMemberName] string propName = "")
        {
            var handler = Volatile.Read(ref PropertyChanged);
            if(handler==null)
            {
                return;
            }
            handler?.Invoke(this, new PropertyChangedEventArgs(propName));
        }
    }

    [DataContract(Namespace = "http://schemas.datacontract.org/2004/07/WcfService5")]
    public class Book : ICloneable
    {
        [DataMember]
        public long Id { get; set; }
        [DataMember]
        public string Name { get; set; }
        [DataMember]
        public string ISBN { get; set; }
        [DataMember]
        public string Abstract { get; set; }
        [DataMember]
        public string Author { get; set; }
        [DataMember]
        public string Comment { get; set; }
        [DataMember]
        public string Content { get; set; }
        [DataMember]
        public string Summary { get; set; }
        [DataMember]
        public string Title { get; set; }
        [DataMember]
        public string Topic { get; set; }
        [DataMember]
        public List<string> Tags { get; set; }

        public object Clone()
        {
            return DeepClone();
        }         

        public Book DeepClone()
        {
            string jsonStr = System.Text.Json.JsonSerializer.Serialize(this);
            Book bk = JsonSerializer.Deserialize<Book>(jsonStr);
            return bk;
        }
    }
}