WPF DatagridTemplate Binding DataTemplate

 <DataGrid.Columns>
     <DataGridTemplateColumn>
         <DataGridTemplateColumn.CellTemplate>
             <Binding Source="{StaticResource DGDataTemplate}"/>
         </DataGridTemplateColumn.CellTemplate>
     </DataGridTemplateColumn>
 </DataGrid.Columns>

<Window x:Class="WpfApp3.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:WpfApp3"
        mc:Ignorable="d"
        Title="MainWindow" WindowState="Maximized">
    <Window.DataContext>
        <local:MainVM/>
    </Window.DataContext>
    <Window.Resources>

        <DataTemplate DataType="{x:Type local:Book}" x:Key="DGDataTemplate">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Id}" Margin="10,0"/>
                <TextBlock Text="{Binding Name}" Margin="10,0"/>
                <TextBlock Text="{Binding ISBN}" Margin="10,0"/>
                <TextBlock Text="{Binding Comment}" Margin="10,0"/>
                <TextBlock Text="{Binding Content}" Margin="10,0"/>
            </StackPanel>
        </DataTemplate>

        <ControlTemplate TargetType="ContentControl" x:Key="DGControlTemplate">
            <DataGrid ItemsSource="{Binding Books}" AutoGenerateColumns="False" CanUserReorderColumns="False"
                      FontSize="30">
                <DataGrid.Columns>
                    <DataGridTemplateColumn>
                        <DataGridTemplateColumn.CellTemplate>
                            <Binding Source="{StaticResource DGDataTemplate}"/>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                </DataGrid.Columns>
            </DataGrid>
        </ControlTemplate>
        
    </Window.Resources>
    <Grid>
        <ContentControl Template="{StaticResource DGControlTemplate}"/>
    </Grid>
</Window>
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Text;
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 WpfApp3
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }

    public class MainVM : INotifyPropertyChanged
    {
        public MainVM()
        {
            Books = new ObservableCollection<Book>();
            for(int i=1;i<10001;i++)
            {
                Books.Add(new Book()
                {
                    Id=i,
                    Name=$"Name_{i}",
                    ISBN=$"ISBN_{i}_{Guid.NewGuid():N}",
                    Comment=$"Comment_{i}",
                    Content=$"Content_{i}"
                });
            }
        }

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

        public event PropertyChangedEventHandler? PropertyChanged;
        private void OnPropertyChanged([CallerMemberName]string propertyName="")
        {
            var handler=PropertyChanged;
            if(handler!=null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }


    public class Book
    {
        public int Id { get; set;  }
        public string Name { get; set; }
        public string ISBN { get; set; }
        public string Comment { get; set; }
        public string Content { get; set; }

    }
}