=======================
9:
======================

<Page
    x:Class="demoUWP2.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:demoUWP2"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Page.TopAppBar>
        <CommandBar IsOpen="True">
            <AppBarButton Icon="Play" Click="{x:Bind OnTimer}"/>
            <AppBarButton Icon="Pause" Click="{x:Bind OnStopTimer}"/>
        </CommandBar>
    </Page.TopAppBar>

    <Canvas Width="300" Height="300">
        <Ellipse Width="10" Height="10" Fill="Red" Canvas.Left="145" Canvas.Top="145"/>
        <Line Canvas.Left="150" Canvas.Top="150" StrokeThickness="3" Stroke="Blue"
                X1="0" Y1="0" X2="120" Y2="0">
            <Line.RenderTransform>
                <RotateTransform CenterX="0" CenterY="0" Angle="270" x:Name="rotate"/>
            </Line.RenderTransform>
        </Line>
    </Canvas>
</Page>

using System;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

//Szablon elementu Pusta strona jest udokumentowany na stronie https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x415

namespace demoUWP2
{
    /// <summary>
    /// Pusta strona, która może być używana samodzielnie lub do której można nawigować wewnątrz ramki.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        private DispatcherTimer _timer = new DispatcherTimer();

        public MainPage()
        {
            this.InitializeComponent();
            _timer.Tick += OnTick;
            _timer.Interval = TimeSpan.FromSeconds(1);
        }

        private void OnTimer()
        {
            _timer.Start();
        }

        private void OnTick(object sender, object e)
        {
            double newAngle = rotate.Angle + 6;
            if (newAngle >= 360)
                newAngle = 0;
            rotate.Angle = newAngle;
        }

        private void OnStopTimer()
        {
            _timer.Stop();
        }
    }
}

=========================
8:
=========================
<Page
    x:Class="HelloWorld.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:HelloWorld"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Button Content="Kliknij!"
                            HorizontalAlignment="Left"
                            VerticalAlignment="Top" Margin="153,329,0,0" Click="Button_Click"/>
    </Grid>
</Page>


using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using System;

//Szablon elementu Pusta strona jest udokumentowany na stronie https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x415

namespace HelloWorld
{
    /// <summary>
    /// Pusta strona, która może być używana samodzielnie lub do której można nawigować wewnątrz ramki.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private async void Button_Click(object sender, RoutedEventArgs e)
        {
            MediaElement mediaElement = new MediaElement();
            var synth = new Windows.Media.SpeechSynthesis.SpeechSynthesizer();
            Windows.Media.SpeechSynthesis.SpeechSynthesisStream
                stream = await synth.SynthesizeTextToStreamAsync("Hello, World!");
            mediaElement.SetSource(stream, stream.ContentType);
            mediaElement.Play();
        }
    }
}