lab1/WpfApp2/MainWindow.xaml

<Window x:Class="WpfApp2.MainWindow"
        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:WpfApp2"
        mc:Ignorable="d"
        Title="Musical Store" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <StackPanel Orientation="Horizontal" Margin="10">
            <Label Content="Фильтр:" VerticalAlignment="Center" />
            <ComboBox x:Name="FilterComboBox" SelectionChanged="FilterComboBox_SelectionChanged" Margin="10" />
        </StackPanel>

        <ListView x:Name="InstrumentListView" Grid.Row="1" Margin="10">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Название" DisplayMemberBinding="{Binding Name}" />
                    <GridViewColumn Header="Тип" DisplayMemberBinding="{Binding Type}" />
                    <GridViewColumn Header="Бренд" DisplayMemberBinding="{Binding Brand}" />
                    <GridViewColumn Header="Цена" DisplayMemberBinding="{Binding Price}" />
                </GridView>
            </ListView.View>
        </ListView>
    </Grid>
</Window>