title: Windows.UI.Notifications is missing
body: <p>I want to create simple toast notification to action center in windows 10 from <a href="https://blogs.msdn.microsoft.com/tiles_and_toasts/2015/07/08/quickstart-sending-a-local-toast-notification-and-handling-activations-from-it-windows-10/" rel="noreferrer">this example</a>. But I got problem on Step 2:</p>
  
  <pre><code>using Windows.UI.Notifications;
  </code></pre>
  
  <p>It`s missing. But I have spent a lot of time to find it and got no result. I really have no idea where I can find or at least download it.</p>
  
  <p>What I tried:</p>
  
  <ol>
  <li>After long search I found <code>Windows.UI.dll</code> in <code>C:\Windows\System32</code> but when I try to add it as reference into project I got this error. Even after I tried to copy it and made this fully accessible nothing changed</li>
  </ol>
  
  <p><a href="https://i.stack.imgur.com/x8KxT.png" rel="noreferrer"><img src="https://i.stack.imgur.com/x8KxT.png" alt="enter image description here"></a></p>
  
  <ol start="2">
  <li>I tried to reinstall .Net (I`m using 4.5.2)</li>
  <li>Installed Windows 10 SDK</li>
  <li>Tried to import with global </li>
  <li>Added</li>
  </ol>
  
  <blockquote>
  <pre><code>&lt;PropertyGroup&gt;
        &lt;TargetPlatformVersion&gt;10.0&lt;/TargetPlatformVersion&gt;
  &lt;/PropertyGroup&gt;
  </code></pre>
  </blockquote>
  
  <ol start="6">
  <li>Added <code>System.Runtime.dll</code> reference</li>
  </ol>
  
  <p>Example code which probably is useless for you:</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;
  using Microsoft.Toolkit.Uwp.Notifications;
  using Microsoft.QueryStringDotNET;
  using Windows.UI.Notifications;
  
  
  namespace MessagerClient.Notifications {
      class DefaultWindowsNotification {
  
          public static void notificationTest() {
              string title = "Andrew sent you a picture";
              string content = "Check this out, Happy Canyon in Utah!";
              string image = "http://blogs.msdn.com/something.jpg";
              string logo = "ms-appdata:///local/Andrew.jpg";
              ToastVisual visual = new ToastVisual() {
  
                  BindingGeneric = new ToastBindingGeneric() {
  
                      Children =
                      {
                          new AdaptiveText()
                          {
                              Text = title
                          },
  
                          new AdaptiveText()
                          {
                              Text = content
                          },
  
                          new AdaptiveImage()
                          {
                              Source = image
                          }
                      },
  
                      AppLogoOverride = new ToastGenericAppLogo() {
                          Source = logo,
                          HintCrop = ToastGenericAppLogoCrop.Circle
                      }
                  }
              };
              Console.WriteLine("NOTIFICATION");
              //Can`t use because of Windows.UI library
              ToastNotificationManager.CreateToastNotifier().Show(visual);
          }
      }
  }
  </code></pre>