Sneaker2/SneakersSkakunov/UserPage.xaml

<Page x:Class="SneakersSkakunov.UserPage"
      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:SneakersSkakunov"
      mc:Ignorable="d" 
      d:DesignHeight="720" d:DesignWidth="1080"
      Title="UserPage">

    <Grid Background="#f5f5f5">
        <TextBlock FontSize="30" HorizontalAlignment="Center" Foreground="#292929" Margin="10" FontWeight="DemiBold">Пользователь</TextBlock>
    </Grid>
</Page>