<Page x:Class="TdApp.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:TdApp" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Name="Self"> <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="*"/> </Grid.RowDefinitions> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition Width="Auto"/> </Grid.ColumnDefinitions> <TextBox x:Name="Input"/> <Button Grid.Column="1" x:Name="Send" Content="send" Click="Button_Click"/> </Grid> <ListBox Grid.Row="1" x:Name="ItemsControl" ItemsSource="{Binding Items, ElementName=Self}"> </ListBox> <!--<Button Content="Test" Click="Button_Click"/>--> </Grid> </Page>