zxc/SSS/PageAdmin.xaml

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

    <Grid Background="Lavender">
        <Grid.RowDefinitions>
            <RowDefinition Height="0.75*"/>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition Height="0.25*" MinHeight="30"/>
            <RowDefinition Height="0.25*" MinHeight="30"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <StackPanel Grid.Row="0" Grid.Column="1">
            <TextBlock
           TextWrapping="Wrap" 
            HorizontalAlignment="Center" VerticalAlignment="Center"
            RenderTransformOrigin="0.602,0.975"> 
    <Run FontSize="21" Foreground="Gray" FontWeight="Bold">Меню админимстратора</Run>
            </TextBlock>
        </StackPanel>
        <StackPanel Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" Margin="0,0,266,100" Grid.RowSpan="2">
            <TextBlock
           TextWrapping="Wrap" 
            HorizontalAlignment="Left" VerticalAlignment="Center"
            RenderTransformOrigin="0.602,0.975"> 
    <Run FontSize="21" Foreground="Gray" FontWeight="Bold">Запись</Run>
            </TextBlock>
            <TextBlock
            TextWrapping="Wrap" 
            HorizontalAlignment="Left" VerticalAlignment="Center"
            RenderTransformOrigin="0.602,0.975"> 
    <Run FontSize="21" Foreground="Gray" FontWeight="Bold">История записей</Run>
            </TextBlock>
            <TextBlock 
            TextWrapping="Wrap"
             HorizontalAlignment="Left" VerticalAlignment="Center"
            RenderTransformOrigin="0.602,0.975">  
    <Button FontSize="21" Foreground="Gray" FontWeight="Bold" Click="GoTabl" >Просмотр пользователей</Button>
                <Button Click="GoCars" FontSize="21" Foreground="Gray" FontWeight="Bold" >Просмотр основной таблицы</Button>
            </TextBlock>
        </StackPanel>
    </Grid>
</Page>