MainWindow.xaml

<Window x:Class="NoNameDesktopPet.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:NoNameDesktopPet"
        mc:Ignorable="d"
        xmlns:gif="https://github.com/XamlAnimatedGif/XamlAnimatedGif"
        Title="NoNameDesktopPet" Height="230" Width="400"
        PreviewMouseLeftButtonDown="Window_PreviewMouseLeftButtonDown"
        Style="{StaticResource stlWindow}">
    <Grid>
        <Image gif:AnimationBehavior.SourceUri="./gif/bochi.gif" />
        <Image x:Name="Bochi" Visibility="Visible" 
            gif:AnimationBehavior.SourceUri="./gif/bochi.gif"
            gif:AnimationBehavior.RepeatBehavior="1"
            gif:AnimationBehavior.AutoStart="True"  
            gif:AnimationBehavior.AnimateInDesignMode="True"
            />
    </Grid>
</Window>