CulAvalonia/Culusas/Views/Culuculator.axaml

<UserControl 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="500" d:DesignHeight="300"
             x:Class="Culusas.Views.Culuculator"
			 x:DataType="vm:MainWindowViewModel"
			 xmlns:vm="using:Culusas.ViewModels"
			 Background="#FF8C00">
	<Grid>
		<StackPanel HorizontalAlignment="Center" Margin="50">
		<TextBlock Text="Выберите арифметическую операцию" FontFamily="Century Gothic"  HorizontalAlignment="Center"/>
		<ComboBox x:Name="CBBVibor" HorizontalAlignment="Center" Margin="0 6 0 0" ItemsSource="{Binding CululVM.deistV}" SelectedIndex="{Binding CululVM.Index}"/>
		<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" >
			<TextBox FontFamily="Century Gothic" Text="{Binding CululVM.InitA}" BorderBrush="#CC5500" CornerRadius="9"   Background="#FAA76C" Foreground="Black" Margin="20"  Height="20" Width="40"/>
			<TextBlock Text="{Binding CululVM.Operator}" Margin="20 20 20 0"/>
			<TextBox FontFamily="Century  Gothic"  Text="{Binding CululVM.InitB}" BorderBrush="#CC5500" CornerRadius="9" Background="#FAA76C" Margin="20"  Height="20" Width="40"/>
		</StackPanel>
		<Button Command="{Binding CululVM.DeistviaAandB}" HorizontalAlignment="Center" FontFamily="Century Gothic" BorderBrush="#FF8C00" CornerRadius="9"  Background="#CC5500" Height="30" Width="90">Вычислить</Button>
		<TextBlock Text="Результат" FontFamily="Century Gothic" Margin="0,10,0,0" HorizontalAlignment="Center" Classes="tbl1"/>
		<TextBlock Text="{Binding CululVM.Provertik}"  Classes="tbl1" Margin="0,10,0,0" Background="White" Height="30" Width="100" HorizontalAlignment="Center" VerticalAlignment="Center"/>
	</StackPanel>
	</Grid>
 
</UserControl>