Узнаем загруженность процессора

<UserControl x:Class="CpuTest.MainPage"
    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" 
    mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
    <Grid x:Name="LayoutRoot">
        <StackPanel>
            <StackPanel Orientation="Horizontal" Margin="10">
                <TextBlock Text="Средняя загруженность процессора: " />
                <TextBlock x:Name="tbAveProcessorLoad" Text="NaN" />
            </StackPanel>
            <StackPanel Orientation="Horizontal" Margin="10">
                <TextBlock Text="Средняя нагрузка процесса Silverlight: " />
                <TextBlock x:Name="tbAveProcessLoad" Text="NaN" />
            </StackPanel>
            <StackPanel Margin="10">
                <TextBlock Text="GPU: " />
                <TextBlock x:Name="tbGpuCollection" Text="" />
            </StackPanel>       
        </StackPanel>
    </Grid>
</UserControl>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Threading;

namespace CpuTest
{
    public partial class MainPage : UserControl
    {
        DispatcherTimer timer = new DispatcherTimer();
        Analytics analytics = new Analytics();

        public MainPage()
        {
            InitializeComponent();

            // определяем все GPU:
            foreach (GpuInformation gpuInfo in analytics.GpuCollection)
            {
                tbGpuCollection.Text
                    += " Device Id: " + gpuInfo.DeviceId
                    + "\n Driver Version: " + gpuInfo.DriverVersion
                    + "\n Vendor Id: " + gpuInfo.VendorId + "\n\n";
            }

            timer.Interval = TimeSpan.FromSeconds(1);
            timer.Tick += (sender, e) =>
                {
                    tbAveProcessorLoad.Text = analytics.AverageProcessorLoad.ToString();
                    tbAveProcessLoad.Text = analytics.AverageProcessLoad.ToString();
                };
            timer.Start();
        }
    }
}