windowedMyApp/WindowedMyApp/StartPage.xaml

<Page x:Class="WindowedMyApp.StartPage"
      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:WindowedMyApp"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="StartPage">

    <Grid>
        
        <Grid.RowDefinitions>
            <RowDefinition Height="50"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        
        <Grid Background="BlueViolet">
        <TextBlock Grid.Row="0" Text="Здесь могла быть именно ваша реклама!" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="Chartreuse"/>
        </Grid>

        <StackPanel Grid.Row="1" VerticalAlignment="Center" Orientation="Horizontal">
            
            <StackPanel Orientation="Vertical" Margin="20 0 20 0">
                <TextBlock Text="Название: ">
                    <Label x:Name="nameTour1"/>
                </TextBlock>

                <TextBlock Text="Дата начала: ">
                    <Label x:Name="dateStartTour1"/>
                </TextBlock>

                <TextBlock Text="Дата окончания: ">
                    <Label x:Name="dateFinishTour1"/>
                </TextBlock>

                <TextBlock Text="Стоимость: ">
                    <Label x:Name="costTour1"/>
                </TextBlock>

            </StackPanel>

            <StackPanel Orientation="Vertical" Margin="20 0 20 0">
                <TextBlock Text="Название: ">
                    <Label x:Name="nameTour2"/>
                </TextBlock>

                <TextBlock Text="Дата начала: ">
                    <Label x:Name="dateStartTour2"/>
                </TextBlock>

                <TextBlock Text="Дата окончания: ">
                    <Label x:Name="dateFinishTour2"/>
                </TextBlock>

                <TextBlock Text="Стоимость: ">
                    <Label x:Name="costTour2"/>
                </TextBlock>

            </StackPanel>

            <StackPanel Orientation="Vertical" Margin="20 0 20 0">
                <TextBlock Text="Название: ">
                    <Label x:Name="nameTour3"/>
                </TextBlock>

                <TextBlock Text="Дата начала: ">
                    <Label x:Name="dateStartTour3"/>
                </TextBlock>

                <TextBlock Text="Дата окончания: ">
                    <Label x:Name="dateFinishTour3"/>
                </TextBlock>

                <TextBlock Text="Стоимость: ">
                    <Label x:Name="costTour3"/>
                </TextBlock>

            </StackPanel>

        </StackPanel>
    </Grid>
</Page>