`Additional information: Layout measurement override of element 'GdPicture12.WPF.ThumbnailEx+ListViewEx+VirtualizingHorizontalTilePanel' should not return PositiveInfinity as its DesiredSize, even if Infinity is passed in as available size.`
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<Window x:Class="GDDemo.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:GDDemo"
xmlns:GdP="clr-namespace:GdPicture12.WPF;assembly=GdPicture.NET.12"
>
<Window.DataContext>
<local:GDVM/>
</Window.DataContext>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button Content="ShowMe" Command="{Binding ClickMeCommand}" Width="100" Height="30" ></Button>
<GdP:GdViewer local:DocEditorEx.Source="{Binding DocList}" Grid.Row="1" Grid.Column="1" />
<GdP:ThumbnailEx BorderThickness="3" HorizontalAlignment="Left" Margin="4" Name="thumbnailExWPF2" BorderBrush="Black" Width="150" Grid.Column="1" Background="LightGray"/>
</Grid>
</Window>