Меню XAML

<Window x:Class="Time_Calculaor.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:Time_Calculaor"

        mc:Ignorable="d"

        Title="Меню" 

        Height="400" 

        Width="600"

        MinHeight="200"

        MinWidth="300">

    <Grid>

        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="100" />

            <ColumnDefinition Width="*" />

        </Grid.ColumnDefinitions>

        <StackPanel Background="Gray">

            <TextBlock Text="Меню" TextAlignment="Center" />

            <Button Content="1" />

            <Button Content="2" />

            <Button Content="3" />

        </StackPanel>

        <Grid Grid.Column="1">

            <TextBlock 

                Text="Програма" 

                FontSize="24"

                HorizontalAlignment="Center"

                VerticalAlignment="Center" />      

        </Grid>

    </Grid>

</Window>