MainWindow.xaml

<Window x:Class="CarSharing.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:CarSharing"
        xmlns:viewModel="clr-namespace:CarSharing.MVVM.ViewModel"
        mc:Ignorable="d"
        Title="MainWindow" MinHeight="450" MinWidth="840"
        Height="600" Width="900"
        WindowStartupLocation="CenterScreen">

    <!--Background="Transparent"
        WindowStyle="None"
        AllowsTransparency="True"-->

    <Window.DataContext>
        <viewModel:MainViewModel/>
    </Window.DataContext>

    <Border Background="#83c7bd">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="135"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>

            <Grid.RowDefinitions>
                <RowDefinition Height="70"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>

            <TextBlock Text="ДРАЙВИКС"
                   VerticalAlignment="Center"
                   HorizontalAlignment="Left"
                   Foreground="Black"
                   FontSize="20"
                   Margin="10,0,10,0"/>

            <StackPanel Grid.Row="1" Grid.Column="0">

                <RadioButton Content="Главная"
                         Width="130"
                         Height="40"
                         FontSize="19"
                         Style="{StaticResource MenuButtonTheme}"
                         IsChecked="True"
                         Command="{Binding HomeViewCommand}"/>

                <RadioButton Content="Машины"
                         Width="130"
                         Height="40"
                         FontSize="19"
                         Style="{StaticResource MenuButtonTheme}"
                         Command="{Binding CarsViewCommand}"/>

                <RadioButton Content="Данные"
                         Width="130"
                         Height="40"
                         FontSize="19"
                         Style="{StaticResource MenuButtonTheme}"/>

            </StackPanel>

            <TextBox Grid.Column="1"
                 Width="260"
                 Height="25"
                 HorizontalAlignment="Left"
                 Margin="10"
                 Style="{StaticResource ModernSearch}"/>

            <TextBlock Grid.Column="1"
                   Text="Логин"
                   Width="70"
                   Height="25"
                   FontSize="22"
                   VerticalAlignment="Center"
                   HorizontalAlignment="Right"
                   Margin="10"/>

            <ContentControl Grid.Row="1" Grid.Column="1" Margin="10"
                        Content="{Binding CurrentView}"/>

        </Grid>
    </Border>
</Window>