---

<Window
    x:Class="banana.MainWindow"
    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"
    Title="banana"
    d:DesignHeight="450"
    d:DesignWidth="800"
    mc:Ignorable="d">
    <StackPanel Margin="15" Spacing="10">
        <TextBox
            HorizontalContentAlignment="Right"
            FontSize="20"
            Text="0" />

        <Grid
            Height="200"
            ColumnDefinitions="auto,auto,auto,auto"
            RowDefinitions="auto,auto,auto,auto">
            <Button
                Grid.Row="0"
                Grid.Column="0"
                Content="7" />
            <Button
                Grid.Row="0"
                Grid.Column="1"
                Content="8" />
            <Button
                Grid.Row="0"
                Grid.Column="2"
                Content="9" />
            <Button
                Grid.Row="0"
                Grid.Column="3"
                Content="/" />

            <Button
                Grid.Row="1"
                Grid.Column="0"
                Content="4" />
            <Button
                Grid.Row="1"
                Grid.Column="1"
                Content="5" />
            <Button
                Grid.Row="1"
                Grid.Column="2"
                Content="6" />
            <Button
                Grid.Row="1"
                Grid.Column="3"
                Content="*" />

            <Button
                Grid.Row="2"
                Grid.Column="0"
                Content="1" />
            <Button
                Grid.Row="2"
                Grid.Column="1"
                Content="2" />
            <Button
                Grid.Row="2"
                Grid.Column="2"
                Content="3" />
            <Button
                Grid.Row="2"
                Grid.Column="3"
                Content="-" />

            <Button
                Grid.Row="3"
                Grid.Column="0"
                Content="C" />
            <Button
                Grid.Row="3"
                Grid.Column="1"
                Content="0" />
            <Button
                Grid.Row="3"
                Grid.Column="2"
                Content="=" />
            <Button
                Grid.Row="3"
                Grid.Column="3"
                Content="+" />
        </Grid>
    </StackPanel>
    < 
       Menu
       <
        MenuItem Header = "InputGesture"
        
       > 
    >
</Window>