ScrollViewer trong lập trình WPF

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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 ScrollViewer___WPF
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            // get scroll bar offset value
            //MessageBox.Show(scvMain.VerticalOffset.ToString());

            // get viewport height
            //MessageBox.Show(scvMain.ViewportHeight.ToString());

            // scroll to end
            //scvMain.ScrollToEnd();

            // maximum scroll offset
            //MessageBox.Show(scvMain.ScrollableHeight.ToString());           
        }
    }
}
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<Window x:Class="ScrollViewer___WPF.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button  Width="50" Height="30" HorizontalAlignment="Center" Content="click" Click="Button_Click"></Button>
        <Grid  Width="200" HorizontalAlignment="Left">
            <ScrollViewer x:Name="scvMain" VerticalScrollBarVisibility="Auto"
                          HorizontalScrollBarVisibility="Visible">
                <StackPanel>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                    <Button Content="www.howkteam.com"></Button>
                </StackPanel>
            </ScrollViewer>
        </Grid>       
        
        <Grid Width="200" HorizontalAlignment="Right">
            <ScrollViewer>
                <TextBlock TextWrapping="Wrap">
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.comwww.howkteam.com
                www.howkteam.comwww.howkteam.comwww.howkteam.com
                </TextBlock>
            </ScrollViewer>            
        </Grid>
        
    </Grid>
</Window>
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