SEBWIN-667: Fixed crash when third-party application has no title.

SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/ApplicationButton.xaml.cs

@@ -7,6 +7,7 @@
  */
 
 using System;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.Applications.Contracts;
 using SafeExamBrowser.Core.Contracts.Resources.Icons;
@@ -16,8 +17,8 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 {
 	internal partial class ApplicationButton : UserControl
 	{
-		private IApplication application;
+		private readonly IApplication application;
-		private IApplicationWindow window;
+		private readonly IApplicationWindow window;
 
 		internal event EventHandler Clicked;
 
@@ -32,14 +33,19 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 
 		private void InitializeApplicationInstanceButton()
 		{
+			var tooltip = window?.Title ?? application.Tooltip;
+
+			Button.Click += (o, args) => Clicked?.Invoke(this, EventArgs.Empty);
+			Button.ToolTip = tooltip;
 			Icon.Content = IconResourceLoader.Load(window?.Icon ?? application.Icon);
 			Text.Text = window?.Title ?? application.Name;
-			Button.Click += (o, args) => Clicked?.Invoke(this, EventArgs.Empty);
-			var tooltip = window?.Title ?? application.Tooltip;
-			Button.ToolTip = tooltip;
-			System.Windows.Automation.AutomationProperties.SetName(Button, tooltip);
 
-			if (window != null)
+			if (tooltip != default)
+			{
+				AutomationProperties.SetName(Button, string.Empty);
+			}
+
+			if (window != default)
 			{
 				window.IconChanged += Window_IconChanged;
 				window.TitleChanged += Window_TitleChanged;

SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/AudioControl.xaml.cs

@@ -9,6 +9,7 @@
 using System;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
@@ -52,7 +53,9 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -140,27 +143,32 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 			this.muted = muted;
 
 			Button.ToolTip = info;
-			System.Windows.Automation.AutomationProperties.SetName(Button, info);
 			Text.Text = info;
 			Volume.ValueChanged -= Volume_ValueChanged;
 			Volume.Value = Math.Round(volume * 100);
 			Volume.ValueChanged += Volume_ValueChanged;
 
+			AutomationProperties.SetName(Button, info);
+
 			if (muted)
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceUnmuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				ButtonIcon.Content = IconResourceLoader.Load(MutedIcon);
 				PopupIcon.Content = IconResourceLoader.Load(MutedIcon);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 			else
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceMuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				ButtonIcon.Content = LoadIcon(volume);
 				PopupIcon.Content = LoadIcon(volume);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 		}
 
@@ -178,7 +186,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 		{
 			var icon = volume > 0.66 ? "100" : (volume > 0.33 ? "66" : "33");
 			var uri = new Uri($"pack://application:,,,/SafeExamBrowser.UserInterface.Desktop;component/Images/Audio_Light_{icon}.xaml");
-			var resource = new XamlIconResource { Uri = uri};
+			var resource = new XamlIconResource { Uri = uri };
 
 			return IconResourceLoader.Load(resource);
 		}

SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/KeyboardLayoutButton.xaml.cs

@@ -8,6 +8,7 @@
 
 using System;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.SystemComponents.Contracts.Keyboard;
 
@@ -43,7 +44,8 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 			CultureCodeTextBlock.Text = layout.CultureCode;
 			CultureNameTextBlock.Text = layout.CultureName;
 			LayoutNameTextBlock.Text = layout.LayoutName;
-			System.Windows.Automation.AutomationProperties.SetName(Button, layout.CultureName);
+
+			AutomationProperties.SetName(Button, layout.CultureName);
 		}
 	}
 }

SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/KeyboardLayoutControl.xaml.cs

@@ -6,7 +6,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using System;
 using System.Threading.Tasks;
 using System.Windows.Automation;
 using System.Windows.Controls;
@@ -19,8 +18,8 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 {
 	internal partial class KeyboardLayoutControl : UserControl, ISystemControl
 	{
-		private IKeyboard keyboard;
+		private readonly IKeyboard keyboard;
-		private IText text;
+		private readonly IText text;
 
 		internal KeyboardLayoutControl(IKeyboard keyboard, IText text)
 		{
@@ -46,7 +45,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 			Button.Click += (o, args) =>
 			{
 				Popup.IsOpen = !Popup.IsOpen;
-				this.Dispatcher.BeginInvoke((System.Action)(() =>
+				this.Dispatcher.BeginInvoke((System.Action) (() =>
 				{
 					LayoutsStackPanel.Children[0].Focus();
 				}));
@@ -54,7 +53,9 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -124,6 +125,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 
 			Text.Text = layout.CultureName;
 			Button.ToolTip = tooltip;
+
 			AutomationProperties.SetName(Button, tooltip);
 		}
 

SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/NotificationButton.xaml.cs

@@ -16,7 +16,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.ActionCenter
 {
 	internal partial class NotificationButton : UserControl, INotificationControl
 	{
-		private INotification notification;
+		private readonly INotification notification;
 
 		internal NotificationButton(INotification notification)
 		{

SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/ApplicationControl.xaml.cs

@@ -9,6 +9,7 @@
 using System.Linq;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
@@ -44,10 +45,14 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 			Button.MouseEnter += (o, args) => WindowPopup.IsOpen = WindowStackPanel.Children.Count > 0;
 			Button.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => WindowPopup.IsOpen = WindowPopup.IsMouseOver || ActiveBar.IsMouseOver));
 			Button.ToolTip = application.Tooltip;
-			System.Windows.Automation.AutomationProperties.SetName(Button, application.Tooltip);
 			WindowPopup.CustomPopupPlacementCallback = new CustomPopupPlacementCallback(WindowPopup_PlacementCallback);
 			WindowPopup.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => WindowPopup.IsOpen = IsMouseOver));
 
+			if (application.Tooltip != default)
+			{
+				AutomationProperties.SetName(Button, application.Tooltip);
+			}
+
 			WindowPopup.Opened += (o, args) =>
 			{
 				ActiveBar.Width = double.NaN;
@@ -106,7 +111,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 			}
 			else
 			{
-				single = default(IApplicationWindow);
+				single = default;
 			}
 		}
 	}

SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/AudioControl.xaml.cs

@@ -9,6 +9,7 @@
 using System;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
@@ -51,7 +52,9 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -155,26 +158,31 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 			this.muted = muted;
 
 			Button.ToolTip = info;
-			System.Windows.Automation.AutomationProperties.SetName(Button, info);
 			Volume.ValueChanged -= Volume_ValueChanged;
 			Volume.Value = Math.Round(volume * 100);
 			Volume.ValueChanged += Volume_ValueChanged;
 
+			AutomationProperties.SetName(Button, info);
+
 			if (muted)
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceUnmuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				PopupIcon.Content = IconResourceLoader.Load(MutedIcon);
 				ButtonIcon.Content = IconResourceLoader.Load(MutedIcon);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 			else
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceMuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				PopupIcon.Content = LoadIcon(volume);
 				ButtonIcon.Content = LoadIcon(volume);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 		}
 

SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/KeyboardLayoutButton.xaml.cs

@@ -8,6 +8,7 @@
 
 using System;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.SystemComponents.Contracts.Keyboard;
 
@@ -43,7 +44,8 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 			CultureCodeTextBlock.Text = layout.CultureCode;
 			CultureNameTextBlock.Text = layout.CultureName;
 			LayoutNameTextBlock.Text = layout.LayoutName;
-			System.Windows.Automation.AutomationProperties.SetName(Button, layout.CultureName);
+
+			AutomationProperties.SetName(Button, layout.CultureName);
 		}
 	}
 }

SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/KeyboardLayoutControl.xaml.cs

@@ -22,8 +22,8 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 {
 	internal partial class KeyboardLayoutControl : UserControl, ISystemControl
 	{
-		private IKeyboard keyboard;
+		private readonly IKeyboard keyboard;
-		private IText text;
+		private readonly IText text;
 
 		internal KeyboardLayoutControl(IKeyboard keyboard, IText text)
 		{
@@ -49,7 +49,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 			Button.Click += (o, args) =>
 			{
 				Popup.IsOpen = !Popup.IsOpen;
-				Task.Delay(200).ContinueWith(_ => this.Dispatcher.BeginInvoke((System.Action)(() =>
+				Task.Delay(200).ContinueWith(_ => this.Dispatcher.BeginInvoke((System.Action) (() =>
 				{
 					((LayoutsStackPanel.Children[0] as ContentControl).Content as UIElement).Focus();
 				})));
@@ -57,7 +57,9 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -144,6 +146,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 
 			LayoutCultureCode.Text = layout.CultureCode;
 			Button.ToolTip = tooltip;
+
 			AutomationProperties.SetName(Button, tooltip);
 		}
 

SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/NotificationButton.xaml.cs

@@ -7,6 +7,7 @@
  */
 
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.Core.Contracts.Notifications;
 using SafeExamBrowser.UserInterface.Contracts.Shell;
@@ -16,7 +17,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 {
 	internal partial class NotificationButton : UserControl, INotificationControl
 	{
-		private INotification notification;
+		private readonly INotification notification;
 
 		internal NotificationButton(INotification notification)
 		{
@@ -41,7 +42,8 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls.Taskbar
 		{
 			IconButton.ToolTip = notification.Tooltip;
 			IconButton.Content = IconResourceLoader.Load(notification.IconResource);
-			System.Windows.Automation.AutomationProperties.SetName(this, notification.Tooltip);
+
+			AutomationProperties.SetName(this, notification.Tooltip);
 		}
 	}
 }

SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/ApplicationButton.xaml.cs

@@ -7,6 +7,7 @@
  */
 
 using System;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.Applications.Contracts;
 using SafeExamBrowser.Core.Contracts.Resources.Icons;
@@ -16,8 +17,8 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 {
 	internal partial class ApplicationButton : UserControl
 	{
-		private IApplication application;
+		private readonly IApplication application;
-		private IApplicationWindow window;
+		private readonly IApplicationWindow window;
 
 		internal event EventHandler Clicked;
 
@@ -32,14 +33,19 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 
 		private void InitializeApplicationInstanceButton()
 		{
+			var tooltip = window?.Title ?? application.Tooltip;
+
+			Button.Click += (o, args) => Clicked?.Invoke(this, EventArgs.Empty);
+			Button.ToolTip = tooltip;
 			Icon.Content = IconResourceLoader.Load(window?.Icon ?? application.Icon);
 			Text.Text = window?.Title ?? application.Name;
-			Button.Click += (o, args) => Clicked?.Invoke(this, EventArgs.Empty);
-			var tooltip = window?.Title ?? application.Tooltip;
-			Button.ToolTip = tooltip;
-			System.Windows.Automation.AutomationProperties.SetName(Button, tooltip);
 
-			if (window != null)
+			if (tooltip != default)
+			{
+				AutomationProperties.SetName(Button, tooltip);
+			}
+
+			if (window != default)
 			{
 				window.IconChanged += Window_IconChanged;
 				window.TitleChanged += Window_TitleChanged;

SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/AudioControl.xaml.cs

@@ -9,6 +9,7 @@
 using System;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
@@ -52,7 +53,9 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -139,27 +142,32 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 			this.muted = muted;
 
 			Button.ToolTip = info;
-			System.Windows.Automation.AutomationProperties.SetName(Button, info);
 			Text.Text = info;
 			Volume.ValueChanged -= Volume_ValueChanged;
 			Volume.Value = Math.Round(volume * 100);
 			Volume.ValueChanged += Volume_ValueChanged;
 
+			AutomationProperties.SetName(Button, info);
+
 			if (muted)
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceUnmuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				ButtonIcon.Content = IconResourceLoader.Load(MutedIcon);
 				PopupIcon.Content = IconResourceLoader.Load(MutedIcon);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 			else
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceMuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				ButtonIcon.Content = LoadIcon(volume);
 				PopupIcon.Content = LoadIcon(volume);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 		}
 

SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/KeyboardLayoutButton.xaml.cs

@@ -8,6 +8,7 @@
 
 using System;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.SystemComponents.Contracts.Keyboard;
 
@@ -43,7 +44,8 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 			CultureCodeTextBlock.Text = layout.CultureCode;
 			CultureNameTextBlock.Text = layout.CultureName;
 			LayoutNameTextBlock.Text = layout.LayoutName;
-			System.Windows.Automation.AutomationProperties.SetName(Button, layout.CultureName);
+
+			AutomationProperties.SetName(Button, layout.CultureName);
 		}
 	}
 }

SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/KeyboardLayoutControl.xaml.cs

@@ -6,7 +6,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using System;
 using System.Threading.Tasks;
 using System.Windows.Automation;
 using System.Windows.Controls;
@@ -19,8 +18,8 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 {
 	internal partial class KeyboardLayoutControl : UserControl, ISystemControl
 	{
-		private IKeyboard keyboard;
+		private readonly IKeyboard keyboard;
-		private IText text;
+		private readonly IText text;
 
 		internal KeyboardLayoutControl(IKeyboard keyboard, IText text)
 		{
@@ -54,7 +53,9 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -124,6 +125,7 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 
 			Text.Text = layout.CultureName;
 			Button.ToolTip = tooltip;
+
 			AutomationProperties.SetName(Button, tooltip);
 		}
 

SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/NotificationButton.xaml.cs

@@ -16,7 +16,7 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.ActionCenter
 {
 	internal partial class NotificationButton : UserControl, INotificationControl
 	{
-		private INotification notification;
+		private readonly INotification notification;
 
 		internal NotificationButton(INotification notification)
 		{

SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/ApplicationControl.xaml.cs

@@ -9,6 +9,7 @@
 using System.Linq;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
@@ -44,10 +45,14 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 			Button.MouseEnter += (o, args) => WindowPopup.IsOpen = WindowStackPanel.Children.Count > 0;
 			Button.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => WindowPopup.IsOpen = WindowPopup.IsMouseOver || ActiveBar.IsMouseOver));
 			Button.ToolTip = application.Tooltip;
-			System.Windows.Automation.AutomationProperties.SetName(Button, application.Tooltip);
 			WindowPopup.CustomPopupPlacementCallback = new CustomPopupPlacementCallback(WindowPopup_PlacementCallback);
 			WindowPopup.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => WindowPopup.IsOpen = IsMouseOver));
 
+			if (application.Tooltip != default)
+			{
+				AutomationProperties.SetName(Button, application.Tooltip);
+			}
+
 			WindowPopup.Opened += (o, args) =>
 			{
 				ActiveBar.Width = double.NaN;
@@ -106,7 +111,7 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 			}
 			else
 			{
-				single = default(IApplicationWindow);
+				single = default;
 			}
 		}
 	}

SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/AudioControl.xaml.cs

@@ -9,6 +9,7 @@
 using System;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
@@ -51,7 +52,9 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -155,26 +158,31 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 			this.muted = muted;
 
 			Button.ToolTip = info;
-			System.Windows.Automation.AutomationProperties.SetName(Button, info);
 			Volume.ValueChanged -= Volume_ValueChanged;
 			Volume.Value = Math.Round(volume * 100);
 			Volume.ValueChanged += Volume_ValueChanged;
 
+			AutomationProperties.SetName(Button, info);
+
 			if (muted)
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceUnmuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				PopupIcon.Content = IconResourceLoader.Load(MutedIcon);
 				ButtonIcon.Content = IconResourceLoader.Load(MutedIcon);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 			else
 			{
 				var tooltip = text.Get(TextKey.SystemControl_AudioDeviceMuteTooltip);
+
 				MuteButton.ToolTip = tooltip;
-				System.Windows.Automation.AutomationProperties.SetName(MuteButton, tooltip);
 				PopupIcon.Content = LoadIcon(volume);
 				ButtonIcon.Content = LoadIcon(volume);
+
+				AutomationProperties.SetName(MuteButton, tooltip);
 			}
 		}
 

SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/KeyboardLayoutButton.xaml.cs

@@ -8,6 +8,7 @@
 
 using System;
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.SystemComponents.Contracts.Keyboard;
 
@@ -43,7 +44,8 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 			CultureCodeTextBlock.Text = layout.CultureCode;
 			CultureNameTextBlock.Text = layout.CultureName;
 			LayoutNameTextBlock.Text = layout.LayoutName;
-			System.Windows.Automation.AutomationProperties.SetName(Button, layout.CultureName);
+
+			AutomationProperties.SetName(Button, layout.CultureName);
 		}
 	}
 }

SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/KeyboardLayoutControl.xaml.cs

@@ -22,8 +22,8 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 {
 	internal partial class KeyboardLayoutControl : UserControl, ISystemControl
 	{
-		private IKeyboard keyboard;
+		private readonly IKeyboard keyboard;
-		private IText text;
+		private readonly IText text;
 
 		internal KeyboardLayoutControl(IKeyboard keyboard, IText text)
 		{
@@ -57,7 +57,9 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 			var lastOpenedBySpacePress = false;
 			Button.PreviewKeyDown += (o, args) =>
 			{
-				if (args.Key == System.Windows.Input.Key.Space)                 // for some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation, we record the space bar event and leave the popup open for at least 3 seconds
+				// For some reason, the popup immediately closes again if opened by a Space Bar key event - as a mitigation,
+				// we record the space bar event and leave the popup open for at least 3 seconds.
+				if (args.Key == System.Windows.Input.Key.Space)
 				{
 					lastOpenedBySpacePress = true;
 				}
@@ -144,6 +146,7 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 
 			LayoutCultureCode.Text = layout.CultureCode;
 			Button.ToolTip = tooltip;
+
 			AutomationProperties.SetName(Button, tooltip);
 		}
 

SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/NotificationButton.xaml.cs

@@ -7,6 +7,7 @@
  */
 
 using System.Windows;
+using System.Windows.Automation;
 using System.Windows.Controls;
 using SafeExamBrowser.Core.Contracts.Notifications;
 using SafeExamBrowser.UserInterface.Contracts.Shell;
@@ -16,7 +17,7 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 {
 	internal partial class NotificationButton : UserControl, INotificationControl
 	{
-		private INotification notification;
+		private readonly INotification notification;
 
 		internal NotificationButton(INotification notification)
 		{
@@ -41,6 +42,8 @@ namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
 		{
 			IconButton.ToolTip = notification.Tooltip;
 			IconButton.Content = IconResourceLoader.Load(notification.IconResource);
+
+			AutomationProperties.SetName(this, notification.Tooltip);
 		}
 	}
 }