MainWindow.xaml

<Window x:Class="VNRec.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:VNRec"
        xmlns:p="clr-namespace:VNRec.Properties"
        Background="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"
        Title="VN Recommendations" SizeToContent="WidthAndHeight" ResizeMode="CanMinimize"
        Loaded="WindowLoaded">
    <Window.Resources>
        <local:ScoreConverter x:Key="scoreConverter"/>
        <DataTemplate x:Key="RecommendationTemplate">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="Auto"/>
                </Grid.ColumnDefinitions>
                <TextBlock Grid.Column="0" Margin="0,0,5,0">
                    <Hyperlink NavigateUri="{Binding Uri}" RequestNavigate="Hyperlink_RequestNavigate">
                        <TextBlock Text="{Binding Title}"/>
                    </Hyperlink>
                </TextBlock>
                <TextBlock Text="{Binding Score, Converter={StaticResource scoreConverter}}" Grid.Column="1" HorizontalAlignment="Right"/>
            </Grid>
        </DataTemplate>
    </Window.Resources>
    <StackPanel Orientation="Vertical">
        <StackPanel Orientation="Horizontal" Margin="10">
            <Label Content="User ID" Target="{Binding ElementName=UserId}" Padding="5,0,5,0" VerticalAlignment="Center"/>
            <TextBox Name="UserId" Width="70" Height="22" Text="{Binding  Source={x:Static p:Settings.Default}, Path=LastUserId, Mode=TwoWay}"/>
            <Button Content="Update" Name="UpdateButton" Width="75" Height="25" Margin="10,0,10,0" Click="Update_Click"/>
        </StackPanel>
        <Separator Height="1" Margin="0"/>
        <Grid Margin="10,0,10,0">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="1*"/>
                <ColumnDefinition Width="1*"/>
                <ColumnDefinition Width="1*"/>
                <ColumnDefinition Width="1*"/>
                <ColumnDefinition Width="1*"/>
            </Grid.ColumnDefinitions>
            <StackPanel Orientation="Vertical" Grid.Column="0" Margin="0,0,5,10">
                <Label Content="Similar user" Target="{Binding ElementName=SimilarUserList}"/>
                <ItemsControl Name="SimilarUserList" Height="Auto" ItemTemplate="{StaticResource RecommendationTemplate}"/>
            </StackPanel>
            <Rectangle Grid.Column="1" VerticalAlignment="Stretch" Width="1" Margin="5,0,5,0" Fill="Gray" SnapsToDevicePixels="True" UseLayoutRounding="True"/>
            <StackPanel Orientation="Vertical" Grid.Column="2" Margin="5,0,5,10">
                <Label Content="Relative popularity" Target="{Binding ElementName=RelativePopularityList}"/>
                <ItemsControl Name="RelativePopularityList" Height="Auto" ItemTemplate="{StaticResource RecommendationTemplate}"/>
            </StackPanel>
            <Rectangle Grid.Column="3" VerticalAlignment="Stretch" Width="1" Margin="5,0,5,0" Fill="Gray" SnapsToDevicePixels="True" UseLayoutRounding="True"/>
            <StackPanel Orientation="Vertical" Grid.Column="4" Margin="5,0,0,10">
                <Label Content="Linear regression" Target="{Binding ElementName=LinearRegressionList}"/>
                <ItemsControl Name="LinearRegressionList" Height="Auto" ItemTemplate="{StaticResource RecommendationTemplate}"/>
            </StackPanel>
        </Grid>
        <Separator Height="1" Margin="0"/>
        <TextBlock Name="MostSimilarUser" DataContext="{Binding}" Margin="10" Visibility="Hidden">
            Most similar user <Hyperlink NavigateUri="{Binding Uri}" RequestNavigate="Hyperlink_RequestNavigate"><TextBlock Text="{Binding Name}"/></Hyperlink>
        </TextBlock>
        <Separator Height="1" Margin="0"/>
        <StatusBar>
            <StatusBarItem>
                <TextBlock x:Name="StatusText"/>
            </StatusBarItem>
            <StatusBarItem>
                <ProgressBar Name="StatusProgress" Width="100" Height="16" Minimum="0" Maximum="100" Visibility="Hidden"/>
            </StatusBarItem>
        </StatusBar>
    </StackPanel>
</Window>