A simple example of testing and showing Windows toast notifications.

Toast notification

How all this is done

Install nuget package

Microsoft.Toolkit.Uwp.Notifications

Specify window version in project file to enable Windows notifications

<TargetFramework>net6.0-windows10.0.17763.0</TargetFramework>

Create and show a toast message

var toastBuilder = new ToastContentBuilder()  
	.AddArgument("action", "general")  
	.AddArgument("actionId", 344)  
	.AddText("You got a mail!")  
	.AddText("You won the lottery!");  
      
toastBuilder.Show();

Handle toast actions

ToastNotificationManagerCompat.OnActivated += toastArgs =>  
{  
	ToastArguments args = ToastArguments.Parse(toastArgs.Argument);  

	Application.Current.Dispatcher.Invoke(delegate  
	{  
		 MessageBox.Show("Toast activated. Args: " + args);  
	});  
};  

Cleaning up messages

ToastNotificationManagerCompat.Uninstall();

For more info about the Toast API, check out: Toast UX Guidance - Windows apps | Microsoft Docs