Test/WpfApp1/Pages/RedactPage.xaml

<Page x:Class="WpfApp1.Pages.RedactPage"
      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:WpfApp1.Pages"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="RedactPage">

    <Grid>
        <StackPanel>
        <TextBox Name="TBName"></TextBox>
        <Button Name="BTNSave" Click="BTNSave_Click">Сохранить</Button>
        </StackPanel>
    </Grid>
</Page>