Exemplos de WPF 3.5 (Windows Presentation Foundation) - 001 - Hello World

<Window x:Class="_001_HelloWorld.Window1"
    xmlns
="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x
="http://schemas.microsoft.com/winfx/2006/xaml"
    Title
="Window1" Height="300" Width="300">
    
<Grid>
        
<Label Height="28" Name="label1" Margin="20" 
               VerticalAlignment
="Top" HorizontalAlignment="Center">
               Hello World!!!
        
</Label>
        
<Button Height="23" Name="button1" VerticalAlignment="Center" 
                HorizontalAlignment
="Center" Width="75" 
                Click
="button1_Click">Clique aqui</Button>
    
</Grid>
</Window>
using System.Windows;
using 
System.Windows.Media;

namespace 
_001_HelloWorld
{
    public partial class Window1 : Window
    {
        
public Window1()
        {
            InitializeComponent()
;
        
}

        
private void button1_Click(object sender, RoutedEventArgs e)
        {
            
/*
             * Rendering Tier 0. 
               The video card will not provide any hardware acceleration.
               This corresponds to a DirectX version level of less than 7.0.

             * Rendering Tier 1. 
               The video card can provide partial hardware acceleration.
               This corresponds to a DirectX version >= 7.0 and < 9.0.

             * Rendering Tier 2. 
               All features that can be hardware accelerated will be.
               This corresponds to a DirectX version >= 9.0.
             */
            
MessageBox.Show((RenderCapability.Tier >> 16).ToString());
        
}
    }
}

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