<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="ThicknessConverter_Csharp.Window1" Title="ThicknessConverter Sample"> <DockPanel Width="400" HorizontalAlignment="Left" VerticalAlignment="Top"> <TextBlock DockPanel.Dock="Top" FontFamily="Verdana" FontSize="18" FontWeight="Bold" Margin="5"> ThicknessConverter Sample</TextBlock> <Border Name="border1" Height="300" Width="300" Border.BorderThickness="2" Border.BorderBrush="Black" DockPanel.Dock="Top"> <Grid Height="30" VerticalAlignment="Top"> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <TextBlock Grid.Row="0" Name="bThickness"/> <TextBlock Grid.Row="1" Name="bColor"/> </Grid> </Border> <Grid DockPanel.Dock="Top"> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <TextBlock Grid.Row="1" Grid.Column="2" TextWrapping="Wrap">Set the BorderBrush Property:</TextBlock> <ListBox VerticalAlignment="Top" Grid.Column="3" Grid.Row="1" Width="60" Height="50" Margin="5" SelectionChanged="changeColor"> <ListBoxItem>Red</ListBoxItem> <ListBoxItem>Green</ListBoxItem> <ListBoxItem>Blue</ListBoxItem> <ListBoxItem>Yellow</ListBoxItem> <ListBoxItem>Orange</ListBoxItem> <ListBoxItem>Purple</ListBoxItem> <ListBoxItem>Silver</ListBoxItem> <ListBoxItem>Pink</ListBoxItem> <ListBoxItem>Maroon</ListBoxItem> <ListBoxItem>Brown</ListBoxItem> <ListBoxItem>Black</ListBoxItem> </ListBox> </Grid> </DockPanel> </Window> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Navigation; using System.Windows.Media; namespace ThicknessConverter_Csharp { public partial class Window1 : Window { public void changeColor(object sender, SelectionChangedEventArgs args) { ListBoxItem li2 = ((sender as ListBox).SelectedItem as ListBoxItem); BrushConverter myBrushConverter = new BrushConverter(); border1.BorderBrush = (Brush)myBrushConverter.ConvertFromString((string)li2.Content); bColor.Text = "Border.Borderbrush =" + li2.Content.ToString(); } } }