Test_Demo_Boldin_41P/DemoTest_Boldin_41P/windows/windChangePriority.xaml

<Window x:Class="DemoTest_Boldin_41P.windChangePriority"
        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:DemoTest_Boldin_41P"
        mc:Ignorable="d"
        Title="windChangePriority" Height="400" Width="500">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="7*"/>
            <ColumnDefinition Width="59*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="50*"/>
            <RowDefinition Height="369*"/>
        </Grid.RowDefinitions>
       
        <TextBlock Text="Приятный шелест" Grid.Row="0" Grid.Column="1" FontSize="40"></TextBlock>
        <StackPanel Grid.Row="1" Grid.Column="1">
            <TextBox  Width="200px" Height="40px" Name="tbPrior"></TextBox>
            <Button Content="Поменять" Click="Button_Click"></Button>
        </StackPanel>
        
    </Grid>
</Window>