КИ Лаб3 XAML

<Window x:Class="Lab3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="250" Width="525">
    <Grid Name="grid1">
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition></ColumnDefinition>
            <ColumnDefinition></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <ListBox Name="lstBox" Grid.Column="0" Grid.Row="0" DisplayMemberPath="ProductName">
        </ListBox>
        <StackPanel Name="spanel" Grid.Column="1" DataContext="{Binding ElementName=lstBox, Path=SelectedItem}">
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" >
                <Label>Quantity per user:</Label>
                <TextBox Width="150" Text="{Binding Path=QuantityPerUnit}"></TextBox>
            </StackPanel>
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" >
                <Label>Units in stock:</Label>
                <TextBox Width="150" Text="{Binding Path=UnitsInStock}"></TextBox>
            </StackPanel>
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" >
                <Label>Unit price:</Label>
                <TextBox Width="150" Text="{Binding Path=UnitPrice}"></TextBox>
            </StackPanel>

            <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Bottom" Height="200" >
                <Button Name="btn1" Width="250" Height="70" Click="btn1_Click" >Supplier Detail</Button>
            </StackPanel>
        </StackPanel>
    </Grid>
</Window>

<Window x:Class="Lab3.Details"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:Lab3"
        Title="Details" Height="300" Width="300">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
            <Label>Company name:</Label>
            <TextBox Height="20" Text="{Binding CompanyName}"></TextBox>
        </StackPanel>
        <StackPanel Grid.Row="1" Orientation="Horizontal" VerticalAlignment="Center">
            <Label>Address:</Label>
            <TextBox Height="20" Text="{Binding Address}"></TextBox>
        </StackPanel>
        <StackPanel Grid.Row="2" Orientation="Horizontal" VerticalAlignment="Center">
            <Label>City:</Label>
            <TextBox Height="20" Text="{Binding City}"></TextBox>
        </StackPanel>
    </Grid>
</Window>