TourApp/AddEditPage.xaml

<Page x:Class="ToursApp.AddEditPage"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:ToursApp"
      mc:Ignorable="d"
      Title="AddEditPage" Height="416.185" Width="747.977">

    <Grid Margin="10,68,0,38">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="33*"/>
            <ColumnDefinition Width="127*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="38*"/>
            <RowDefinition Height="63*"/>
            <RowDefinition Height="49*"/>
        </Grid.RowDefinitions>
        <TextBlock HorizontalAlignment="Left"  Margin="56,48,0,0" TextWrapping="Wrap" Text="Название" VerticalAlignment="Top"/>
        <TextBlock HorizontalAlignment="Left" Margin="45,68,0,0" Grid.Row="1" TextWrapping="Wrap" Text="Количество звезд" VerticalAlignment="Top" RenderTransformOrigin="1.052,2.281"/>
        <TextBlock HorizontalAlignment="Left" Margin="56,38,0,0" Grid.Row="2" TextWrapping="Wrap" Text="Страна" VerticalAlignment="Top"/>
        <TextBox Grid.Column="1" HorizontalAlignment="Left" Height="23" Margin="0,46,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="497"/>
        <TextBox Grid.Column="1" HorizontalAlignment="Left" Height="23" Margin="0,67,0,0" Grid.Row="1" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="345"/>
        <ComboBox x:Name="ComboCountries"  Margin="0,29,0,0" Grid.Row="2" VerticalAlignment="Top" HorizontalAlignment="Right" Width="576" Grid.Column="1"/>
        <Button Content="Сохранить"  Name="BtnSave" Click="BtnSave_Click" Grid.Column="1" HorizontalAlignment="Left" Margin="476,64,0,0" Grid.Row="1" VerticalAlignment="Top" Width="75"/>
    </Grid>
</Page>