WPF

<UserControl x:Class="MyChart.MainPage"
    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"
    mc:Ignorable="d"
    d:DesignHeight="350" d:DesignWidth="529"
             xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit" Loaded="UserControl_Loaded" xmlns:my="clr-namespace:MyChart">

    <Grid x:Name="LayoutRoot" Background="White" Height="332" Width="547">
        <Button Content="Display Chart" Height="38" HorizontalAlignment="Left" Margin="203,173,0,0" Name="btnDisplayChart" VerticalAlignment="Top" Width="113" Click="btnDisplayChart_Click" />
        <ComboBox Height="38" HorizontalAlignment="Left" Margin="157,99,0,0" Name="comboBox1" VerticalAlignment="Top" Width="198">
            <ComboBoxItem Content="Column Chart" IsSelected="True" />
            <ComboBoxItem Content="Bar Chart" />
            <ComboBoxItem Content="Pie Chart" />
        </ComboBox>
    </Grid>
</UserControl>

string wordToSearch = "word";
 
TextRange tr = new TextRange(this.rtb.Document.ContentStart, 
 
int startPos = tr.Text.IndexOf(wordToSearch);
 
this.rtb.Document.ContentEnd);
                        
                       
if (startPos > -1)
{
   int l = this.GetLinesCount(tr.Text, startPosition);
   
  TextPointer startRtb = this.rtb.Document.ContentStart;
  TextPointer start = startRtb.GetPositionAtOffset(startPos + l);
  TextPointer end = start.GetPositionAtOffset(wordToSearch.Length);
  
  this.rtb.Selection.Select(start, end);  
  this.rtb.Selection.ApplyPropertyValue(
                                TextElement.BackgroundProperty, 
                                this.rtb.SelectionBrush);
}
 
public int GetLinesCount(string str, int startPosition)
{
    int lines = str.Take(startPosition).Count(k => 
                k.Equals((char)13) || k.Equals((char)10));
    return lines + 2;
}

private ICommand _SelectedLinkCommand;
public ICommand SelectedLinkCommand
{
    get
    {
        if (_SelectedLinkCommand == null)
            _SelectedLinkCommand = new RelayCommand(SelectedLinkExecuted, SelectedLinkCanExecute);
        return _SelectedLinkCommand;
    }
}

private bool SelectedLinkCanExecute()
{
    return fileSelected;
}
private void SelectedLinkExecuted()
{
    // Handle the link click here
}

<HierarchicalDataTemplate DataType="{x:Type models:NodeModel}"
                            ItemsSource="{Binding Path=Children}">
    <StackPanel Orientation="Horizontal"
                Margin="2">

        <TextBlock Margin="0,0,5,0">
            <Hyperlink NavigateUri="{Binding Caption}"
                        Foreground="#0C2DAA"
                        Command="{Binding SelectedLinkCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={ x:Type }}}">

byte[] bytBuffer = new byte[4096]; //holds a block of byte for process.
               long lngBytesProcessed = 0; //running count of byte processed.
               long lngFileLength = fsInput.Length; //the input file is lenght.
               int intBytesIncurrentBlock; //current bytes being processed.

               CryptoStream csCryptoStream;

               //Declare your CryptoServiceProvider.
               System.Security.Cryptography.RijndaelManaged cspRijndael = new System.Security.Cryptography.RijndaelManaged();

               //Setup Progress bar.
               pbStatus.Value = 0;
               pbStatus.Maximum = 100;

               //Determine if encryption or decryption and set setup CryptoStream.

               switch (Direction)
               {
                   case CryptoAction.ActionEncrypt: 
                    csCryptoStream = new CryptoStream(fsOutput, cspRijndael.CreateEncryptor(bytKey, bytIV), CryptoStreamMode.Write);
                    break;

                   case CryptoAction.ActionDecrypt:
                       csCryptoStream=new CryptoStream(fsOutput, cspRijndael.CreateDecryptor(bytKey, bytIV), CryptoStreamMode.Write);
                       break;
                       
               }

               //Use While to loop until all of the file is processed.

               while (lngBytesProcessed<lngFileLength){
                   //Read file with the input filestream.
                   intBytesIncurrentBlock = fsInput.Read(bytBuffer, 0, 4096);

                   //Write output file with the crytostreamm.
                   csCryptoStream.Write(bytBuffer, 0, intBytesIncurrentBlock);

                   //Update lngBytesProcessed.
                   lngBytesProcessed = lngBytesProcessed + long.Parse(intBytesIncurrentBlock);

                   //Update progress bar
                   pbStatus.Value = int.Parse((lngBytesProcessed/lngFileLength)*100);

               }

<Window.Resources>
    <HierarchicalDataTemplate DataType="{x:Type model:PartDescriptionUpdateModel}"
                              ItemsSource="{Binding Path=Descriptions}">
        <StackPanel Orientation="Horizontal">
            <Image Source="/Abtech.Spares.UI;component/Media/Graphics/lancard_enabled_128x128.png"
                   Height="16"
                   Width="16"
                   Margin="0,0,3,0"/>
            <TextBlock Text="{Binding Path=PartNo}"/>
            <Label Content=" - "/>
            <TextBlock Text="{Binding Path=Description}"/>
        </StackPanel>

    </HierarchicalDataTemplate>

</Window.Resources>


<Grid>

    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"></RowDefinition>
        <RowDefinition Height="Auto"></RowDefinition>
        <RowDefinition Height="*"></RowDefinition>
        <RowDefinition Height="Auto"></RowDefinition>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition></ColumnDefinition>
    </Grid.ColumnDefinitions>

    <!--List of part info-->
    <ListBox x:Name="lstParts"
             Grid.Row="2"
             Margin="5"
             ItemsSource="{Binding PartsData}"/>

</Grid>