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Use the content-scrolling methods of the ScrollViewer class

<Window  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     x:Class="ScrollViewer_Methods.Window1"     Title="ScrollViewer Methods Sample"     Loaded="onLoad">   <DockPanel Background="Azure">     <TextBlock DockPanel.Dock="Top" FontSize="20" FontWeight="Bold" Margin="10">ScrollViewer Content Scrolling Methods</TextBlock>     <StackPanel DockPanel.Dock="Left" Width="150">       <Button Margin="3,0,0,2" Background="White" Click="svLineUp">Adjust Line Up</Button>       <Button Margin="3,0,0,2" Background="White" Click="svLineDown">Adjust Line Down</Button>       <Button Margin="3,0,0,2" Background="White" Click="svLineRight">Adjust Line Right</Button>       <Button Margin="3,0,0,2" Background="White" Click="svLineLeft">Adjust Line Left</Button>       <Button Margin="3,0,0,2" Background="White" Click="svPageUp">Adjust Page Up</Button>       <Button Margin="3,0,0,2" Background="White" Click="svPageDown">Adjust Page Down</Button>       <Button Margin="3,0,0,2" Background="White" Click="svPageRight">Adjust Page Right</Button>       <Button Margin="3,0,0,2" Background="White" Click="svPageLeft">Adjust Page Left</Button>       <TextBlock Name="txt2" TextWrapping="Wrap"/>     </StackPanel>          <Border BorderBrush="Black" Height="520" Width="520" VerticalAlignment="Top">       <ScrollViewer VerticalScrollBarVisibility="Visible" HorizontalScrollBarVisibility="Auto" Name="sv1">         <TextBlock TextWrapping="Wrap" Width="800" Height="1000" Name="txt1"/>        </ScrollViewer>     </Border>   </DockPanel> </Window> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Automation.Provider; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Navigation; using System.Text; namespace ScrollViewer_Methods {     public partial class Window1 : Window     {         private void onLoad(object sender, System.EventArgs e)         {             StringBuilder myStringBuilder = new StringBuilder(400);             for (int i = 0; i < 100; i++)             {                 myStringBuilder.Append("this is a test ");             }             txt1.Text = myStringBuilder.ToString();         }         private void svLineUp(object sender, RoutedEventArgs e)         {             sv1.LineUp();         }         private void svLineDown(object sender, RoutedEventArgs e)         {             sv1.LineDown();         }         private void svLineRight(object sender, RoutedEventArgs e)         {             sv1.LineRight();         }         private void svLineLeft(object sender, RoutedEventArgs e)         {             sv1.LineLeft();         }         private void svPageUp(object sender, RoutedEventArgs e)         {             sv1.PageUp();         }         private void svPageDown(object sender, RoutedEventArgs e)         {             sv1.PageDown();         }         private void svPageRight(object sender, RoutedEventArgs e)         {             sv1.PageRight();         }         private void svPageLeft(object sender, RoutedEventArgs e)         {             sv1.PageLeft();         }     } }