DemoexamDemo/DemoexamUser11/windows/WindowChangePriority.xaml

<Window x:Class="DemoexamUser11.windows.WindowChangePriority"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:DemoexamUser11.windows"
        mc:Ignorable="d"
        Title="Изменение приоритета" Height="150" Width="300">
    <Grid>
        <StackPanel Orientation="Vertical">
            <GroupBox Header="Введите новое значение приоритета">
                <TextBox x:Name="textBoxValue"/>
            </GroupBox>
            <Button x:Name="buttonSave" Content="Сохранить" Click="buttonSave_Click"/>
            <Button x:Name="buttonBack" Content="Назад" Click="buttonBack_Click"/>
        </StackPanel>
    </Grid>
</Window>