diff --git a/SafeExamBrowser.Core/Communication/BaseHost.cs b/SafeExamBrowser.Core/Communication/BaseHost.cs
index 338df6e5..1e9136b3 100644
--- a/SafeExamBrowser.Core/Communication/BaseHost.cs
+++ b/SafeExamBrowser.Core/Communication/BaseHost.cs
@@ -103,9 +103,9 @@ namespace SafeExamBrowser.Core.Communication
 
 				if (IsAuthorized(message?.CommunicationToken))
 				{
-					if (message is SimpleMessage)
+					if (message is SimpleMessage simpleMessage)
 					{
-						response = OnReceive((message as SimpleMessage).Purport);
+						response = OnReceive(simpleMessage.Purport);
 					}
 					else
 					{
diff --git a/SafeExamBrowser.Core/Logging/DefaultLogFormatter.cs b/SafeExamBrowser.Core/Logging/DefaultLogFormatter.cs
index 310bae5e..2b88ec2d 100644
--- a/SafeExamBrowser.Core/Logging/DefaultLogFormatter.cs
+++ b/SafeExamBrowser.Core/Logging/DefaultLogFormatter.cs
@@ -15,14 +15,14 @@ namespace SafeExamBrowser.Core.Logging
 	{
 		public string Format(ILogContent content)
 		{
-			if (content is ILogText)
+			if (content is ILogText text)
 			{
-				return (content as ILogText).Text;
+				return text.Text;
 			}
 
-			if (content is ILogMessage)
+			if (content is ILogMessage message)
 			{
-				return FormatLogMessage(content as ILogMessage);
+				return FormatLogMessage(message);
 			}
 
 			throw new NotImplementedException($"The default formatter is not yet implemented for log content of type {content.GetType()}!");
diff --git a/SafeExamBrowser.UserInterface.Classic/BrowserWindow.xaml.cs b/SafeExamBrowser.UserInterface.Classic/BrowserWindow.xaml.cs
index 9084889a..c818243c 100644
--- a/SafeExamBrowser.UserInterface.Classic/BrowserWindow.xaml.cs
+++ b/SafeExamBrowser.UserInterface.Classic/BrowserWindow.xaml.cs
@@ -93,9 +93,9 @@ namespace SafeExamBrowser.UserInterface.Classic
 
 		private void InitializeBrowserWindow(IBrowserControl browserControl)
 		{
-			if (browserControl is System.Windows.Forms.Control)
+			if (browserControl is System.Windows.Forms.Control control)
 			{
-				BrowserControlHost.Child = browserControl as System.Windows.Forms.Control;
+				BrowserControlHost.Child = control;
 			}
 
 			Closing += (o, args) => closing?.Invoke();
diff --git a/SafeExamBrowser.UserInterface.Classic/Controls/KeyboardLayoutControl.xaml.cs b/SafeExamBrowser.UserInterface.Classic/Controls/KeyboardLayoutControl.xaml.cs
index 76f00cf6..f6f31466 100644
--- a/SafeExamBrowser.UserInterface.Classic/Controls/KeyboardLayoutControl.xaml.cs
+++ b/SafeExamBrowser.UserInterface.Classic/Controls/KeyboardLayoutControl.xaml.cs
@@ -83,9 +83,9 @@ namespace SafeExamBrowser.UserInterface.Classic.Controls
 
 			foreach (var child in LayoutsStackPanel.Children)
 			{
-				if (child is KeyboardLayoutButton)
+				if (child is KeyboardLayoutButton keyboardLayoutButton)
 				{
-					(child as KeyboardLayoutButton).IsCurrent = false;
+					keyboardLayoutButton.IsCurrent = false;
 				}
 			}
 
diff --git a/SafeExamBrowser.UserInterface.Classic/Taskbar.xaml.cs b/SafeExamBrowser.UserInterface.Classic/Taskbar.xaml.cs
index f2734fd7..81f92ddd 100644
--- a/SafeExamBrowser.UserInterface.Classic/Taskbar.xaml.cs
+++ b/SafeExamBrowser.UserInterface.Classic/Taskbar.xaml.cs
@@ -29,25 +29,25 @@ namespace SafeExamBrowser.UserInterface.Classic
 
 		public void AddApplication(IApplicationButton button)
 		{
-			if (button is UIElement)
+			if (button is UIElement uiElement)
 			{
-				ApplicationStackPanel.Children.Add(button as UIElement);
+				ApplicationStackPanel.Children.Add(uiElement);
 			}
 		}
 
 		public void AddNotification(INotificationButton button)
 		{
-			if (button is UIElement)
+			if (button is UIElement uiElement)
 			{
-				NotificationStackPanel.Children.Add(button as UIElement);
+				NotificationStackPanel.Children.Add(uiElement);
 			}
 		}
 
 		public void AddSystemControl(ISystemControl control)
 		{
-			if (control is UIElement)
+			if (control is UIElement uiElement)
 			{
-				SystemControlStackPanel.Children.Add(control as UIElement);
+				SystemControlStackPanel.Children.Add(uiElement);
 			}
 		}
 
@@ -82,9 +82,9 @@ namespace SafeExamBrowser.UserInterface.Classic
 		{
 			foreach (var child in SystemControlStackPanel.Children)
 			{
-				if (child is ISystemControl)
+				if (child is ISystemControl systemControl)
 				{
-					(child as ISystemControl).Close();
+					systemControl.Close();
 				}
 			}
 		}
diff --git a/SafeExamBrowser.UserInterface.Classic/Utilities/RuntimeWindowLogFormatter.cs b/SafeExamBrowser.UserInterface.Classic/Utilities/RuntimeWindowLogFormatter.cs
index d7c49d06..b8c9c605 100644
--- a/SafeExamBrowser.UserInterface.Classic/Utilities/RuntimeWindowLogFormatter.cs
+++ b/SafeExamBrowser.UserInterface.Classic/Utilities/RuntimeWindowLogFormatter.cs
@@ -15,14 +15,14 @@ namespace SafeExamBrowser.UserInterface.Classic.Utilities
 	{
 		public string Format(ILogContent content)
 		{
-			if (content is ILogText)
+			if (content is ILogText text)
 			{
-				return (content as ILogText).Text;
+				return text.Text;
 			}
 
-			if (content is ILogMessage)
+			if (content is ILogMessage message)
 			{
-				return FormatLogMessage(content as ILogMessage);
+				return FormatLogMessage(message);
 			}
 
 			throw new NotImplementedException($"The runtime window formatter is not yet implemented for log content of type {content.GetType()}!");
diff --git a/SafeExamBrowser.UserInterface.Classic/ViewModels/LogViewModel.cs b/SafeExamBrowser.UserInterface.Classic/ViewModels/LogViewModel.cs
index 5cf28944..1c2761c3 100644
--- a/SafeExamBrowser.UserInterface.Classic/ViewModels/LogViewModel.cs
+++ b/SafeExamBrowser.UserInterface.Classic/ViewModels/LogViewModel.cs
@@ -33,13 +33,13 @@ namespace SafeExamBrowser.UserInterface.Classic.ViewModels
 
 		public void Notify(ILogContent content)
 		{
-			if (content is ILogText)
+			if (content is ILogText text)
 			{
-				AppendLogText(content as ILogText);
+				AppendLogText(text);
 			}
-			else if (content is ILogMessage)
+			else if (content is ILogMessage message)
 			{
-				AppendLogMessage(content as ILogMessage);
+				AppendLogMessage(message);
 			}
 			else
 			{
diff --git a/SafeExamBrowser.UserInterface.Windows10/BrowserWindow.xaml.cs b/SafeExamBrowser.UserInterface.Windows10/BrowserWindow.xaml.cs
index 29d7ca44..3401513d 100644
--- a/SafeExamBrowser.UserInterface.Windows10/BrowserWindow.xaml.cs
+++ b/SafeExamBrowser.UserInterface.Windows10/BrowserWindow.xaml.cs
@@ -91,9 +91,9 @@ namespace SafeExamBrowser.UserInterface.Windows10
 
 		private void InitializeBrowserWindow(IBrowserControl browserControl)
 		{
-			if (browserControl is System.Windows.Forms.Control)
+			if (browserControl is System.Windows.Forms.Control control)
 			{
-				BrowserControlHost.Child = browserControl as System.Windows.Forms.Control;
+				BrowserControlHost.Child = control;
 			}
 
 			Closing += (o, args) => closing?.Invoke();
diff --git a/SafeExamBrowser.UserInterface.Windows10/Taskbar.xaml.cs b/SafeExamBrowser.UserInterface.Windows10/Taskbar.xaml.cs
index d2a7b975..dcf739b4 100644
--- a/SafeExamBrowser.UserInterface.Windows10/Taskbar.xaml.cs
+++ b/SafeExamBrowser.UserInterface.Windows10/Taskbar.xaml.cs
@@ -29,25 +29,25 @@ namespace SafeExamBrowser.UserInterface.Windows10
 
 		public void AddApplication(IApplicationButton button)
 		{
-			if (button is UIElement)
+			if (button is UIElement uiElement)
 			{
-				ApplicationStackPanel.Children.Add(button as UIElement);
+				ApplicationStackPanel.Children.Add(uiElement);
 			}
 		}
 
 		public void AddNotification(INotificationButton button)
 		{
-			if (button is UIElement)
+			if (button is UIElement uiElement)
 			{
-				NotificationStackPanel.Children.Add(button as UIElement);
+				NotificationStackPanel.Children.Add(uiElement);
 			}
 		}
 
 		public void AddSystemControl(ISystemControl control)
 		{
-			if (control is UIElement)
+			if (control is UIElement uiElement)
 			{
-				SystemControlStackPanel.Children.Add(control as UIElement);
+				SystemControlStackPanel.Children.Add(uiElement);
 			}
 		}
 
@@ -82,9 +82,9 @@ namespace SafeExamBrowser.UserInterface.Windows10
 		{
 			foreach (var child in SystemControlStackPanel.Children)
 			{
-				if (child is ISystemControl)
+				if (child is ISystemControl systemControl)
 				{
-					(child as ISystemControl).Close();
+					systemControl.Close();
 				}
 			}
 		}
diff --git a/SafeExamBrowser.UserInterface.Windows10/ViewModels/LogViewModel.cs b/SafeExamBrowser.UserInterface.Windows10/ViewModels/LogViewModel.cs
index dbac4603..e012152f 100644
--- a/SafeExamBrowser.UserInterface.Windows10/ViewModels/LogViewModel.cs
+++ b/SafeExamBrowser.UserInterface.Windows10/ViewModels/LogViewModel.cs
@@ -33,13 +33,13 @@ namespace SafeExamBrowser.UserInterface.Windows10.ViewModels
 
 		public void Notify(ILogContent content)
 		{
-			if (content is ILogText)
+			if (content is ILogText text)
 			{
-				AppendLogText(content as ILogText);
+				AppendLogText(text);
 			}
-			else if (content is ILogMessage)
+			else if (content is ILogMessage message)
 			{
-				AppendLogMessage(content as ILogMessage);
+				AppendLogMessage(message);
 			}
 			else
 			{