<Window x:Class="WpfApp1.MainWindow"
        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:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid ScrollViewer.CanContentScroll="True">
        <Grid.RowDefinitions>
            <RowDefinition Height="30"/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="130"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <ScrollViewer Grid.Column="1"   Grid.RowSpan="2">
        <WrapPanel Orientation="Horizontal"  SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical"  ScrollViewer.CanContentScroll="True" Name="WP" HorizontalAlignment="Left" Margin="0.4,30,-0.4,0" VerticalAlignment="Top"  ScrollViewer.VerticalScrollBarVisibility="Auto"/>
        </ScrollViewer>
            <Button Content="Button" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="110" Grid.Row="1" Height="34" Click="Button_Click"/>

    </Grid>
</Window>