如何在保留格式的同时在WPF TextBox中显示文本文件的内容？

using System.IO;
using System.Windows;
using System.Windows.Controls;

namespace WpfApp
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void LoadFileButton_Click(object sender, RoutedEventArgs e)
        {
            // 选择文本文件
            Microsoft.Win32.OpenFileDialog openFileDialog = new Microsoft.Win32.OpenFileDialog();
            openFileDialog.Filter = "文本文件 (*.txt)|*.txt";
            if (openFileDialog.ShowDialog() == true)
            {
                // 读取文本文件内容
                string fileContent = File.ReadAllText(openFileDialog.FileName);

                // 创建TextBlock控件
                TextBlock textBlock = new TextBlock();
                textBlock.TextWrapping = TextWrapping.Wrap;
                textBlock.Text = fileContent;

                // 将TextBlock作为TextBox的内容
                TextBox textBox = new TextBox();
                textBox.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
                textBox.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;
                textBox.Content = textBlock;

                // 将TextBox添加到界面中
                ContentGrid.Children.Add(textBox);
            }
        }
    }
}