如何将WPF网格单元格复制到同一网格中的其他单元格

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Grid Copy Example" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition Width="Auto"/>
        </Grid.ColumnDefinitions>

        <TextBox x:Name="sourceTextBox" Grid.Row="0" Grid.Column="0" Margin="5"/>
        <Button Content="Copy" Click="CopyButton_Click" Grid.Row="0" Grid.Column="1" Margin="5"/>
        <TextBox x:Name="destinationTextBox" Grid.Row="1" Grid.Column="0" Margin="5"/>
    </Grid>
</Window>

using System.Windows;

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

        private void CopyButton_Click(object sender, RoutedEventArgs e)
        {
            // 复制源文本框的内容到目标文本框
            destinationTextBox.Text = sourceTextBox.Text;
        }
    }
}