prs/prs.desktop/Forms/Console.xaml

<wpf:ThemableWindow x:Class="PRSDesktop.Console"
        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"
        xmlns:local="clr-namespace:PRSDesktop"
		xmlns:wpf="clr-namespace:InABox.Wpf;assembly=InABox.Wpf"
        mc:Ignorable="d"
        Title="Console" Height="450" Width="800" Loaded="Window_Loaded" Closing="Window_Closing">
    <Window.Resources>

        <Style TargetType="ItemsControl" x:Key="LogViewerStyle">

            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate>
                        <ScrollViewer CanContentScroll="True">
                            <ItemsPresenter />
                        </ScrollViewer>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>

            <Setter Property="ItemsPanel">
                <Setter.Value>
                    <ItemsPanelTemplate>
                        <VirtualizingStackPanel IsItemsHost="True" />
                    </ItemsPanelTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <DataTemplate DataType="{x:Type local:LogEntry}">
            <Grid IsSharedSizeScope="True">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition SharedSizeGroup="Date" Width="120" />
                    <ColumnDefinition SharedSizeGroup="Type" Width="60" />
                    <ColumnDefinition SharedSizeGroup="User" Width="120" />
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>

                <TextBlock Text="{Binding DateTime}" Grid.Column="0" FontFamily="Courier New"
                           Margin="5,0,5,0" />

                <TextBlock Text="{Binding Type}" Grid.Column="1" FontFamily="Courier New"
                           Margin="5,0,5,0" />

                <TextBlock Text="{Binding User}" Grid.Column="2" FontFamily="Courier New"
                           Margin="0,0,2,0" />

                <TextBlock Text="{Binding Message}" Grid.Column="3" FontFamily="Courier New"
                           TextWrapping="Wrap" />
            </Grid>
        </DataTemplate>

        <DataTemplate DataType="{x:Type local:CollapsibleLogEntry}">
            <Grid IsSharedSizeScope="True">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition SharedSizeGroup="Date" Width="120" />
                    <ColumnDefinition SharedSizeGroup="Type" Width="60" />
                    <ColumnDefinition SharedSizeGroup="User" Width="120" />
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>

                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition />
                </Grid.RowDefinitions>

                <TextBlock Text="{Binding DateTime}" Grid.Column="0" FontFamily="Courier New"
                           Margin="5,0,5,0" />

                <TextBlock Text="{Binding Type}" Grid.Column="1" FontFamily="Courier New"
                           Margin="5,0,5,0" />

                <TextBlock Text="{Binding User}" Grid.Column="2" FontFamily="Courier New"
                           Margin="0,0,2,0" />

                <TextBlock Text="{Binding Message}" Grid.Column="3" FontFamily="Courier New"
                           TextWrapping="Wrap" />

                <ToggleButton x:Name="Expander" Grid.Row="1" Grid.Column="0"
                              VerticalAlignment="Top" Content="+" HorizontalAlignment="Right" />

                <ItemsControl ItemsSource="{Binding Contents}" Style="{StaticResource LogViewerStyle}"
                              Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"
                              x:Name="Contents" Visibility="Collapsed" />

            </Grid>
            <DataTemplate.Triggers>
                <Trigger SourceName="Expander" Property="IsChecked" Value="True">
                    <Setter TargetName="Contents" Property="Visibility" Value="Visible" />
                    <Setter TargetName="Expander" Property="Content" Value="-" />
                </Trigger>
            </DataTemplate.Triggers>
        </DataTemplate>

    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <DockPanel Grid.Row="0" Margin="5,5,5,0">
            <Label Content="Search" VerticalContentAlignment="Center" />
            <TextBox x:Name="Search" Margin="5,0,0,0" DockPanel.Dock="Left" Background="LightYellow"
                     VerticalContentAlignment="Center" TextChanged="Search_TextChanged" />
        </DockPanel>
        <Border BorderBrush="Gray" Grid.Row="1" BorderThickness="0.75" Margin="5" Padding="2" Background="LightYellow">
            <ItemsControl x:Name="Log" ItemsSource="{Binding}" Style="{StaticResource LogViewerStyle}" />
        </Border>
    </Grid>
</wpf:ThemableWindow>