WPF

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    DataContext="{Binding RelativeSource={RelativeSource Self}}"
    WindowStartupLocation="CenterScreen"
    Title="Window1" Height="300" Width="300">
    
    <Grid>
        <Image x:Name="TestImage" Source="{Binding Path=ImageSource}" />
    </Grid>

</Window>

Image Base64StringToImage(string base64ImageString)
{
    try
    {
        byte[] b;
        b = Convert.FromBase64String(base64ImageString);
        MemoryStream ms = new System.IO.MemoryStream(b);
        System.Drawing.Image img = System.Drawing.Image.FromStream(ms);

        //////////////////////////////////////////////
        //convert System.Drawing.Image to WPF image
        System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(img);
        IntPtr hBitmap = bmp.GetHbitmap();
        System.Windows.Media.ImageSource imageSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());

        Image wpfImage = new Image();
        wpfImage.Source = imageSource;
        wpfImage.Width = wpfImage.Height = 16;
        //////////////////////////////////////////////

        return wpfImage;
    }
    catch
    {
        Image img1 = new Image();
        img1.Source = new BitmapImage(new Uri(@"/passwordManager;component/images/TreeView/empty-bookmark.png", UriKind.Relative));
        img1.Width = img1.Height = 16;
        return img1;
    }
}

public string ImageSource { get; set; }
ImageSource = Base64StringToImage("iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAABjUExURXK45////6fT8PX6/bTZ8onE643F7Pf7/pDH7PP5/dns+b7e9MPh9Xq86NHo947G7Hm76NTp+PL4/bHY8ojD67rc85bK7b3e9MTh9dLo97vd8/D3/Hy96Xe76Nfr+H+/6f///1bvXooAAAAhdFJOU///////////////////////////////////////////AJ/B0CEAAACHSURBVHjaXI/ZFoMgEEMzLCqg1q37Yv//KxvAlh7zMuQeyAS8d8I2z8PT/AMDShWQfCYJHL0FmlcXSQTGi7NNLSMwR2BQaXE1IfAguPFx5UQmeqwEHSfviz7w0BIMyU86khBDZ8DLfWHOGPJahe66MKe/fIupXKst1VXxW/VgT/3utz99BBgA4P0So6hyl+QAAAAASUVORK5CYIII").Source.ToString();

<UserControl
	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"
	x:Class="IceControls.CivicProgressbar"
	x:Name="UserControl" d:DesignHeight="492" Width="50">
<UserControl.Resources>
       
        <ControlTemplate x:Key="templateThermometer"
                         TargetType="{x:Type ProgressBar}">

            <ControlTemplate.Resources>
                <LinearGradientBrush x:Key="brushStem" 
                                     StartPoint="0 0" EndPoint="7 0">
					<LinearGradientBrush.Transform>
						<RotateTransform  Angle="90"></RotateTransform>
					</LinearGradientBrush.Transform>
                    <GradientStop Offset="0" Color="white" />
					<GradientStop Offset="1" Color="transparent" />
                </LinearGradientBrush>

            </ControlTemplate.Resources>
			
          
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="*" />
                </Grid.RowDefinitions>

              
                <Grid Grid.Row="0">
                    <Grid.ColumnDefinitions>
						<ColumnDefinition Width="100*" />
                    </Grid.ColumnDefinitions>

                  
                    <Border Grid.Column="0" BorderBrush="Gray" 
                            BorderThickness="1 1 1 1"
                            CornerRadius="6 6 0 0" >

                      
                        <Decorator Name="PART_Track">
                            <Border Name="PART_Indicator"
                                    CornerRadius="6 6 0 0"
                                    VerticalAlignment="Bottom"
                                    Background="{StaticResource brushStem}" />
                        </Decorator>
                    </Border>
                </Grid>


            </Grid>
        </ControlTemplate>
     </UserControl.Resources>

    <StackPanel>

        <ProgressBar Template="{StaticResource templateThermometer}" 
    		Orientation="Vertical" Minimum="0" Maximum="100"
    		Width="auto" Height="350" Margin="0,0,0,0" 
    		Value="{Binding ElementName=scroll,Path=Value}" />
        <ScrollBar x:Name="scroll" Orientation="vertical" 
        	Minimum="0" Maximum="100"
        	SmallChange="1" LargeChange="10" 
        	Margin="16.5,0" Height="120.5" />

    </StackPanel>
</UserControl>