MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
        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"
        mc:Ignorable="d" d:DesignWidth="450" d:DesignHeight="265"
        x:Class="RemoteHub.MainWindow"
        Title="RemoteHub" Height="265" Width="450" Icon="/Asset/Icone.png" CanResize="False">

    <Grid>
        <Button Content="Ajouter un logiciel" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="10" Click="AddRDA_Click"/>
        <Button Content="?" VerticalAlignment="Top" HorizontalAlignment="Right" Margin="10" Click="About_Click"/>
        <ListBox x:Name="ListRDA" Width="425" Height="205" VerticalAlignment="Top" Margin="0,50,0,0">
            <ListBox.ItemsPanel>
                <ItemsPanelTemplate>
                    <WrapPanel Orientation="Horizontal"/>
                </ItemsPanelTemplate>
             </ListBox.ItemsPanel>

            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Button Width="70" Height="70" Tag="{Binding}" ToolTip.Tip="{Binding Name}">
                        <Image Source="{Binding IconBitmap}" Stretch="Uniform"/>
                        <Button.ContextMenu>
                            <ContextMenu>
                                <MenuItem Header="Modifier" Tag="{Binding}" Click="ModifyRDA_Click"/>
                                <MenuItem Header="Supprimer" Tag="{Binding}" Click="DeleteRDA_Click"/>
                            </ContextMenu>
                        </Button.ContextMenu>
                    </Button>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>
</Window>