MainWindow.xaml

<!-- Copyright (c) Microsoft. All rights reserved.
     Licensed under the MIT License. See LICENSE file in the project root for full license information. -->
<Window x:Class="QAClient.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:QAClient"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="40"/>
        </Grid.RowDefinitions>
        <TextBox Name="tb_Dialog" Grid.Row="0"/>
        <Grid Grid.Row="1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="80"/>
            </Grid.ColumnDefinitions>
            <TextBox Name="tb_Question" MaxLines="1" Grid.Column="0"/>
            <Button Name="btn_Send" Content="Send" Grid.Column="1" Click="btn_Send_Click"/>
        </Grid>
    </Grid>
</Window>