diff --git a/dotnet/src/support/BUILD.bazel b/dotnet/src/support/BUILD.bazel
index 9cc66665c7618..f7fd31317265c 100644
--- a/dotnet/src/support/BUILD.bazel
+++ b/dotnet/src/support/BUILD.bazel
@@ -37,7 +37,7 @@ csharp_library(
         "//dotnet:source_files_support_needs_from_core",
     ],
     out = "WebDriver.Support",
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     target_frameworks = [
         "netstandard2.0",
@@ -80,7 +80,7 @@ csharp_library(
     ],
     out = "WebDriver.Support.StrongNamed",
     keyfile = "//dotnet:Selenium.snk",
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     target_frameworks = [
         "netstandard2.0",
diff --git a/dotnet/src/support/Selenium.WebDriver.Support.csproj b/dotnet/src/support/Selenium.WebDriver.Support.csproj
index 1b2d7313a771e..9c5716d26749c 100644
--- a/dotnet/src/support/Selenium.WebDriver.Support.csproj
+++ b/dotnet/src/support/Selenium.WebDriver.Support.csproj
@@ -5,7 +5,7 @@
     <AssemblyName>WebDriver.Support</AssemblyName>
     <RootNamespace>OpenQA.Selenium.Support</RootNamespace>
     <BuildSystem>visual-studio</BuildSystem>
-    <LangVersion>12.0</LangVersion>
+    <LangVersion>14.0</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
diff --git a/dotnet/src/webdriver/BUILD.bazel b/dotnet/src/webdriver/BUILD.bazel
index 09c585520ff95..c0abfcdcd1b2d 100644
--- a/dotnet/src/webdriver/BUILD.bazel
+++ b/dotnet/src/webdriver/BUILD.bazel
@@ -51,7 +51,7 @@ csharp_library(
     internals_visible_to = [
         "WebDriver.Common.Tests",
     ],
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     target_frameworks = [
         "net462",
@@ -83,7 +83,7 @@ csharp_library(
     internals_visible_to = [
         "WebDriver.Common.Tests",
     ],
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     resources = [],
     target_frameworks = [
@@ -119,7 +119,7 @@ csharp_library(
     internals_visible_to = [
         "WebDriver.Common.Tests",
     ],
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     resources = [],
     target_frameworks = [
@@ -142,7 +142,7 @@ csharp_library(
     ]) + devtools_version_targets(),
     out = "WebDriver.StrongNamed",
     keyfile = "//dotnet:Selenium.snk",
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     target_frameworks = [
         "net462",
@@ -172,7 +172,7 @@ csharp_library(
     ]) + devtools_version_targets(),
     out = "WebDriver.StrongNamed",
     keyfile = "//dotnet:Selenium.snk",
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     resources = [],
     target_frameworks = [
@@ -206,7 +206,7 @@ csharp_library(
         "NET8_0_OR_GREATER",
     ],
     keyfile = "//dotnet:Selenium.snk",
-    langversion = "12.0",
+    langversion = "14.0",
     nullable = "enable",
     resources = [],
     target_frameworks = [
diff --git a/dotnet/src/webdriver/BiDi/Permissions/PermissionsBiDiExtensions.cs b/dotnet/src/webdriver/BiDi/Permissions/PermissionsBiDiExtensions.cs
index 792d10162936c..4668735c4add7 100644
--- a/dotnet/src/webdriver/BiDi/Permissions/PermissionsBiDiExtensions.cs
+++ b/dotnet/src/webdriver/BiDi/Permissions/PermissionsBiDiExtensions.cs
@@ -26,10 +26,7 @@ public static class PermissionsBiDiExtensions
 {
     public static PermissionsModule AsPermissions(this BiDi bidi)
     {
-        if (bidi is null)
-        {
-            throw new ArgumentNullException(nameof(bidi));
-        }
+        ArgumentNullException.ThrowIfNull(bidi);
 
         return bidi.AsModule<PermissionsModule>();
     }
diff --git a/dotnet/src/webdriver/BiDi/WebDriver.Extensions.cs b/dotnet/src/webdriver/BiDi/WebDriver.Extensions.cs
index 2aedc80a2c092..3a53b2cfc5690 100644
--- a/dotnet/src/webdriver/BiDi/WebDriver.Extensions.cs
+++ b/dotnet/src/webdriver/BiDi/WebDriver.Extensions.cs
@@ -26,7 +26,7 @@ public static class WebDriverExtensions
 {
     public static async Task<BiDi> AsBiDiAsync(this IWebDriver webDriver, BiDiOptions? options = null)
     {
-        if (webDriver is null) throw new ArgumentNullException(nameof(webDriver));
+        ArgumentNullException.ThrowIfNull(webDriver);
 
         string? webSocketUrl = null;
 
diff --git a/dotnet/src/webdriver/Chromium/ChromiumDriver.cs b/dotnet/src/webdriver/Chromium/ChromiumDriver.cs
index ac9b73c04d899..32531af0a6f2c 100644
--- a/dotnet/src/webdriver/Chromium/ChromiumDriver.cs
+++ b/dotnet/src/webdriver/Chromium/ChromiumDriver.cs
@@ -150,15 +150,9 @@ protected ChromiumDriver(ChromiumDriverService service, ChromiumOptions options,
     /// <returns></returns>
     private static ICommandExecutor GenerateDriverServiceCommandExecutor(DriverService service, DriverOptions options, TimeSpan commandTimeout)
     {
-        if (service is null)
-        {
-            throw new ArgumentNullException(nameof(service));
-        }
+        ArgumentNullException.ThrowIfNull(service);
 
-        if (options is null)
-        {
-            throw new ArgumentNullException(nameof(options));
-        }
+        ArgumentNullException.ThrowIfNull(options);
 
         if (service.DriverServicePath == null)
         {
diff --git a/dotnet/src/webdriver/Cookie.cs b/dotnet/src/webdriver/Cookie.cs
index 292757bf7652f..8ee0f581820b1 100644
--- a/dotnet/src/webdriver/Cookie.cs
+++ b/dotnet/src/webdriver/Cookie.cs
@@ -255,10 +255,7 @@ internal long? ExpirySeconds
     /// <returns>A <see cref="Cookie"/> object with the proper parameters set.</returns>
     public static Cookie FromDictionary(Dictionary<string, object?> rawCookie)
     {
-        if (rawCookie == null)
-        {
-            throw new ArgumentNullException(nameof(rawCookie));
-        }
+        ArgumentNullException.ThrowIfNull(rawCookie);
 
         string name = rawCookie["name"]!.ToString()!;
         string value = string.Empty;
diff --git a/dotnet/src/webdriver/CookieJar.cs b/dotnet/src/webdriver/CookieJar.cs
index 39e405559964e..2c666b3dface0 100644
--- a/dotnet/src/webdriver/CookieJar.cs
+++ b/dotnet/src/webdriver/CookieJar.cs
@@ -58,10 +58,7 @@ public ReadOnlyCollection<Cookie> AllCookies
     /// <exception cref="ArgumentNullException">If <paramref name="cookie"/> is <see langword="null"/>.</exception>
     public void AddCookie(Cookie cookie)
     {
-        if (cookie is null)
-        {
-            throw new ArgumentNullException(nameof(cookie));
-        }
+        ArgumentNullException.ThrowIfNull(cookie);
 
         Dictionary<string, object> parameters = new Dictionary<string, object>();
         parameters.Add("cookie", cookie);
@@ -92,10 +89,7 @@ public void DeleteCookieNamed(string name)
     /// <exception cref="ArgumentNullException">If <paramref name="cookie"/> is <see langword="null"/>.</exception>
     public void DeleteCookie(Cookie cookie)
     {
-        if (cookie is null)
-        {
-            throw new ArgumentNullException(nameof(cookie));
-        }
+        ArgumentNullException.ThrowIfNull(cookie);
 
         this.DeleteCookieNamed(cookie.Name);
     }
diff --git a/dotnet/src/webdriver/DevTools/CommandResponseTypeMap.cs b/dotnet/src/webdriver/DevTools/CommandResponseTypeMap.cs
index bd8f56a11cdcc..79c190dc058cd 100644
--- a/dotnet/src/webdriver/DevTools/CommandResponseTypeMap.cs
+++ b/dotnet/src/webdriver/DevTools/CommandResponseTypeMap.cs
@@ -38,15 +38,9 @@ public class CommandResponseTypeMap
     /// <exception cref="ArgumentNullException">If <paramref name="commandSettingsType"/> or <paramref name="commandResponseType"/> are <see langword="null"/>.</exception>
     public void AddCommandResponseType(Type commandSettingsType, Type commandResponseType)
     {
-        if (commandSettingsType is null)
-        {
-            throw new ArgumentNullException(nameof(commandSettingsType));
-        }
+        ArgumentNullException.ThrowIfNull(commandSettingsType);
 
-        if (commandResponseType is null)
-        {
-            throw new ArgumentNullException(nameof(commandResponseType));
-        }
+        ArgumentNullException.ThrowIfNull(commandResponseType);
 
         if (!commandResponseTypeDictionary.ContainsKey(commandSettingsType))
         {
diff --git a/dotnet/src/webdriver/DevTools/WebSocketConnection.cs b/dotnet/src/webdriver/DevTools/WebSocketConnection.cs
index 811312fd5f346..549fb14093883 100644
--- a/dotnet/src/webdriver/DevTools/WebSocketConnection.cs
+++ b/dotnet/src/webdriver/DevTools/WebSocketConnection.cs
@@ -94,10 +94,7 @@ public WebSocketConnection(TimeSpan startupTimeout, TimeSpan shutdownTimeout)
     /// <exception cref="TimeoutException">Thrown when the connection is not established within the startup timeout.</exception>
     public virtual async Task Start(string url)
     {
-        if (url is null)
-        {
-            throw new ArgumentNullException(nameof(url));
-        }
+        ArgumentNullException.ThrowIfNull(url);
 
         this.Log($"Opening connection to URL {url}", DevToolsSessionLogLevel.Trace);
         bool connected = false;
@@ -162,10 +159,7 @@ public virtual async Task Stop()
     /// <returns>The task object representing the asynchronous operation.</returns>
     public virtual async Task SendData(string data)
     {
-        if (data is null)
-        {
-            throw new ArgumentNullException(nameof(data));
-        }
+        ArgumentNullException.ThrowIfNull(data);
 
         ArraySegment<byte> messageBuffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(data));
         this.Log($"SEND >>> {data}");
diff --git a/dotnet/src/webdriver/DevTools/v141/V141Network.cs b/dotnet/src/webdriver/DevTools/v141/V141Network.cs
index e1bf79812f7c4..3c7925bf0a51b 100644
--- a/dotnet/src/webdriver/DevTools/v141/V141Network.cs
+++ b/dotnet/src/webdriver/DevTools/v141/V141Network.cs
@@ -118,10 +118,7 @@ public override async Task DisableFetch()
     /// <exception cref="ArgumentNullException">If <paramref name="userAgent"/> is null.</exception>
     public override async Task SetUserAgentOverride(UserAgent userAgent)
     {
-        if (userAgent is null)
-        {
-            throw new ArgumentNullException(nameof(userAgent));
-        }
+        ArgumentNullException.ThrowIfNull(userAgent);
 
         await network.SetUserAgentOverride(new SetUserAgentOverrideCommandSettings()
         {
@@ -139,10 +136,7 @@ await network.SetUserAgentOverride(new SetUserAgentOverrideCommandSettings()
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueRequest(HttpRequestData requestData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
         var commandSettings = new ContinueRequestCommandSettings()
         {
@@ -179,15 +173,9 @@ public override async Task ContinueRequest(HttpRequestData requestData)
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> or <paramref name="responseData"/> are <see langword="null"/>.</exception>
     public override async Task ContinueRequestWithResponse(HttpRequestData requestData, HttpResponseData responseData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         var commandSettings = new FulfillRequestCommandSettings()
         {
@@ -227,10 +215,7 @@ public override async Task ContinueRequestWithResponse(HttpRequestData requestDa
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueRequestWithoutModification(HttpRequestData requestData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
         await fetch.ContinueRequest(new ContinueRequestCommandSettings() { RequestId = requestData.RequestId }).ConfigureAwait(false);
     }
@@ -281,10 +266,7 @@ await fetch.ContinueWithAuth(new ContinueWithAuthCommandSettings()
     /// <exception cref="ArgumentNullException">If <paramref name="responseData"/> is <see langword="null"/>.</exception>
     public override async Task AddResponseBody(HttpResponseData responseData)
     {
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         // If the response is a redirect, retrieving the body will throw an error in CDP.
         if (responseData.StatusCode < 300 || responseData.StatusCode > 399)
@@ -312,10 +294,7 @@ public override async Task AddResponseBody(HttpResponseData responseData)
     /// <exception cref="ArgumentNullException">If <paramref name="responseData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueResponseWithoutModification(HttpResponseData responseData)
     {
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         await fetch.ContinueResponse(new ContinueResponseCommandSettings() { RequestId = responseData.RequestId }).ConfigureAwait(false);
     }
diff --git a/dotnet/src/webdriver/DevTools/v142/V142Network.cs b/dotnet/src/webdriver/DevTools/v142/V142Network.cs
index 0ce59dcda7c5b..45d1bcf66a361 100644
--- a/dotnet/src/webdriver/DevTools/v142/V142Network.cs
+++ b/dotnet/src/webdriver/DevTools/v142/V142Network.cs
@@ -118,10 +118,7 @@ public override async Task DisableFetch()
     /// <exception cref="ArgumentNullException">If <paramref name="userAgent"/> is null.</exception>
     public override async Task SetUserAgentOverride(UserAgent userAgent)
     {
-        if (userAgent is null)
-        {
-            throw new ArgumentNullException(nameof(userAgent));
-        }
+        ArgumentNullException.ThrowIfNull(userAgent);
 
         await network.SetUserAgentOverride(new SetUserAgentOverrideCommandSettings()
         {
@@ -139,10 +136,7 @@ await network.SetUserAgentOverride(new SetUserAgentOverrideCommandSettings()
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueRequest(HttpRequestData requestData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
         var commandSettings = new ContinueRequestCommandSettings()
         {
@@ -179,15 +173,9 @@ public override async Task ContinueRequest(HttpRequestData requestData)
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> or <paramref name="responseData"/> are <see langword="null"/>.</exception>
     public override async Task ContinueRequestWithResponse(HttpRequestData requestData, HttpResponseData responseData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         var commandSettings = new FulfillRequestCommandSettings()
         {
@@ -227,10 +215,7 @@ public override async Task ContinueRequestWithResponse(HttpRequestData requestDa
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueRequestWithoutModification(HttpRequestData requestData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
         await fetch.ContinueRequest(new ContinueRequestCommandSettings() { RequestId = requestData.RequestId }).ConfigureAwait(false);
     }
@@ -281,10 +266,7 @@ await fetch.ContinueWithAuth(new ContinueWithAuthCommandSettings()
     /// <exception cref="ArgumentNullException">If <paramref name="responseData"/> is <see langword="null"/>.</exception>
     public override async Task AddResponseBody(HttpResponseData responseData)
     {
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         // If the response is a redirect, retrieving the body will throw an error in CDP.
         if (responseData.StatusCode < 300 || responseData.StatusCode > 399)
@@ -312,10 +294,7 @@ public override async Task AddResponseBody(HttpResponseData responseData)
     /// <exception cref="ArgumentNullException">If <paramref name="responseData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueResponseWithoutModification(HttpResponseData responseData)
     {
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         await fetch.ContinueResponse(new ContinueResponseCommandSettings() { RequestId = responseData.RequestId }).ConfigureAwait(false);
     }
diff --git a/dotnet/src/webdriver/DevTools/v143/V143Network.cs b/dotnet/src/webdriver/DevTools/v143/V143Network.cs
index c2074770af733..832ede3f463fc 100644
--- a/dotnet/src/webdriver/DevTools/v143/V143Network.cs
+++ b/dotnet/src/webdriver/DevTools/v143/V143Network.cs
@@ -118,10 +118,7 @@ public override async Task DisableFetch()
     /// <exception cref="ArgumentNullException">If <paramref name="userAgent"/> is null.</exception>
     public override async Task SetUserAgentOverride(UserAgent userAgent)
     {
-        if (userAgent is null)
-        {
-            throw new ArgumentNullException(nameof(userAgent));
-        }
+        ArgumentNullException.ThrowIfNull(userAgent);
 
         await network.SetUserAgentOverride(new SetUserAgentOverrideCommandSettings()
         {
@@ -139,10 +136,7 @@ await network.SetUserAgentOverride(new SetUserAgentOverrideCommandSettings()
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueRequest(HttpRequestData requestData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
         var commandSettings = new ContinueRequestCommandSettings()
         {
@@ -179,15 +173,9 @@ public override async Task ContinueRequest(HttpRequestData requestData)
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> or <paramref name="responseData"/> are <see langword="null"/>.</exception>
     public override async Task ContinueRequestWithResponse(HttpRequestData requestData, HttpResponseData responseData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         var commandSettings = new FulfillRequestCommandSettings()
         {
@@ -227,10 +215,7 @@ public override async Task ContinueRequestWithResponse(HttpRequestData requestDa
     /// <exception cref="ArgumentNullException">If <paramref name="requestData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueRequestWithoutModification(HttpRequestData requestData)
     {
-        if (requestData is null)
-        {
-            throw new ArgumentNullException(nameof(requestData));
-        }
+        ArgumentNullException.ThrowIfNull(requestData);
 
         await fetch.ContinueRequest(new ContinueRequestCommandSettings() { RequestId = requestData.RequestId }).ConfigureAwait(false);
     }
@@ -281,10 +266,7 @@ await fetch.ContinueWithAuth(new ContinueWithAuthCommandSettings()
     /// <exception cref="ArgumentNullException">If <paramref name="responseData"/> is <see langword="null"/>.</exception>
     public override async Task AddResponseBody(HttpResponseData responseData)
     {
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         // If the response is a redirect, retrieving the body will throw an error in CDP.
         if (responseData.StatusCode < 300 || responseData.StatusCode > 399)
@@ -312,10 +294,7 @@ public override async Task AddResponseBody(HttpResponseData responseData)
     /// <exception cref="ArgumentNullException">If <paramref name="responseData"/> is <see langword="null"/>.</exception>
     public override async Task ContinueResponseWithoutModification(HttpResponseData responseData)
     {
-        if (responseData is null)
-        {
-            throw new ArgumentNullException(nameof(responseData));
-        }
+        ArgumentNullException.ThrowIfNull(responseData);
 
         await fetch.ContinueResponse(new ContinueResponseCommandSettings() { RequestId = responseData.RequestId }).ConfigureAwait(false);
     }
diff --git a/dotnet/src/webdriver/DriverOptions.cs b/dotnet/src/webdriver/DriverOptions.cs
index 483ceb03130a4..9fa185cc5946e 100644
--- a/dotnet/src/webdriver/DriverOptions.cs
+++ b/dotnet/src/webdriver/DriverOptions.cs
@@ -269,10 +269,7 @@ public virtual void AddAdditionalOption(string optionName, object optionValue)
     /// <exception cref="ArgumentNullException">If <paramref name="other"/> is <see langword="null"/>.</exception>
     public virtual DriverOptionsMergeResult GetMergeResult(DriverOptions other)
     {
-        if (other is null)
-        {
-            throw new ArgumentNullException(nameof(other));
-        }
+        ArgumentNullException.ThrowIfNull(other);
 
         DriverOptionsMergeResult result = new DriverOptionsMergeResult();
         if (this.BrowserName != null && other.BrowserName != null)
diff --git a/dotnet/src/webdriver/DriverProcessStartedEventArgs.cs b/dotnet/src/webdriver/DriverProcessStartedEventArgs.cs
index 0f48e2704302e..829dad27b8a43 100644
--- a/dotnet/src/webdriver/DriverProcessStartedEventArgs.cs
+++ b/dotnet/src/webdriver/DriverProcessStartedEventArgs.cs
@@ -34,10 +34,7 @@ public class DriverProcessStartedEventArgs : EventArgs
     /// <exception cref="ArgumentNullException">If <paramref name="driverProcess"/> is <see langword="null"/>.</exception>
     public DriverProcessStartedEventArgs(Process driverProcess)
     {
-        if (driverProcess is null)
-        {
-            throw new ArgumentNullException(nameof(driverProcess));
-        }
+        ArgumentNullException.ThrowIfNull(driverProcess);
 
         this.ProcessId = driverProcess.Id;
     }
diff --git a/dotnet/src/webdriver/Firefox/FirefoxDriver.cs b/dotnet/src/webdriver/Firefox/FirefoxDriver.cs
index 7bef00b3f3a53..f4fef3525f4bf 100644
--- a/dotnet/src/webdriver/Firefox/FirefoxDriver.cs
+++ b/dotnet/src/webdriver/Firefox/FirefoxDriver.cs
@@ -203,15 +203,9 @@ public FirefoxDriver(FirefoxDriverService service, FirefoxOptions options, TimeS
     /// <exception cref="ArgumentNullException">If <paramref name="options"/> is <see langword="null"/>.</exception>
     private static ICommandExecutor GenerateDriverServiceCommandExecutor(DriverService service, DriverOptions options, TimeSpan commandTimeout)
     {
-        if (options is null)
-        {
-            throw new ArgumentNullException(nameof(options));
-        }
+        ArgumentNullException.ThrowIfNull(options);
 
-        if (service is null)
-        {
-            throw new ArgumentNullException(nameof(service));
-        }
+        ArgumentNullException.ThrowIfNull(service);
 
         if (service.DriverServicePath == null)
         {
diff --git a/dotnet/src/webdriver/Firefox/FirefoxProfile.cs b/dotnet/src/webdriver/Firefox/FirefoxProfile.cs
index 7284973d066d2..588fa654bb898 100644
--- a/dotnet/src/webdriver/Firefox/FirefoxProfile.cs
+++ b/dotnet/src/webdriver/Firefox/FirefoxProfile.cs
@@ -108,10 +108,7 @@ public static FirefoxProfile FromBase64String(string base64)
     /// <exception cref="ArgumentNullException">If <paramref name="extensionToInstall"/> is <see langword="null"/>.</exception>
     public void AddExtension(string extensionToInstall)
     {
-        if (extensionToInstall is null)
-        {
-            throw new ArgumentNullException(nameof(extensionToInstall));
-        }
+        ArgumentNullException.ThrowIfNull(extensionToInstall);
 
         this.extensions.Add(Path.GetFileNameWithoutExtension(extensionToInstall), new FirefoxExtension(extensionToInstall));
     }
diff --git a/dotnet/src/webdriver/Firefox/Preferences.cs b/dotnet/src/webdriver/Firefox/Preferences.cs
index f02f61f9134f2..db734ff68ff3a 100644
--- a/dotnet/src/webdriver/Firefox/Preferences.cs
+++ b/dotnet/src/webdriver/Firefox/Preferences.cs
@@ -69,15 +69,9 @@ public Preferences(JsonElement defaultImmutablePreferences, JsonElement defaultP
     /// </exception>
     internal void SetPreference(string key, string value)
     {
-        if (key is null)
-        {
-            throw new ArgumentNullException(nameof(key));
-        }
+        ArgumentNullException.ThrowIfNull(key);
 
-        if (value is null)
-        {
-            throw new ArgumentNullException(nameof(value));
-        }
+        ArgumentNullException.ThrowIfNull(value);
 
         if (IsWrappedAsString(value))
         {
@@ -99,10 +93,7 @@ internal void SetPreference(string key, string value)
     /// <exception cref="ArgumentException">If the specified preference is immutable.</exception>
     internal void SetPreference(string key, int value)
     {
-        if (key is null)
-        {
-            throw new ArgumentNullException(nameof(key));
-        }
+        ArgumentNullException.ThrowIfNull(key);
 
         this.ThrowIfPreferenceIsImmutable(key, value);
         this.preferences[key] = value.ToString(CultureInfo.InvariantCulture);
@@ -119,10 +110,7 @@ internal void SetPreference(string key, int value)
     /// <exception cref="ArgumentException">If the specified preference is immutable.</exception>
     internal void SetPreference(string key, bool value)
     {
-        if (key is null)
-        {
-            throw new ArgumentNullException(nameof(key));
-        }
+        ArgumentNullException.ThrowIfNull(key);
 
         this.ThrowIfPreferenceIsImmutable(key, value);
         this.preferences[key] = value ? "true" : "false";
diff --git a/dotnet/src/webdriver/IE/InternetExplorerDriver.cs b/dotnet/src/webdriver/IE/InternetExplorerDriver.cs
index 8ead0709b7db9..88ce8b29312bc 100644
--- a/dotnet/src/webdriver/IE/InternetExplorerDriver.cs
+++ b/dotnet/src/webdriver/IE/InternetExplorerDriver.cs
@@ -161,15 +161,9 @@ public InternetExplorerDriver(InternetExplorerDriverService service, InternetExp
     /// <returns></returns>
     private static ICommandExecutor GenerateDriverServiceCommandExecutor(DriverService service, DriverOptions options, TimeSpan commandTimeout)
     {
-        if (service is null)
-        {
-            throw new ArgumentNullException(nameof(service));
-        }
+        ArgumentNullException.ThrowIfNull(service);
 
-        if (options is null)
-        {
-            throw new ArgumentNullException(nameof(options));
-        }
+        ArgumentNullException.ThrowIfNull(options);
 
         if (service.DriverServicePath == null)
         {
diff --git a/dotnet/src/webdriver/Interactions/Actions.cs b/dotnet/src/webdriver/Interactions/Actions.cs
index 1018a8be10c73..7b0856d970684 100644
--- a/dotnet/src/webdriver/Interactions/Actions.cs
+++ b/dotnet/src/webdriver/Interactions/Actions.cs
@@ -555,10 +555,7 @@ public Actions ScrollByAmount(int deltaX, int deltaY)
     /// <exception cref="ArgumentException">If both or either of Viewport and Element are set.</exception>
     public Actions ScrollFromOrigin(WheelInputDevice.ScrollOrigin scrollOrigin, int deltaX, int deltaY)
     {
-        if (scrollOrigin is null)
-        {
-            throw new ArgumentNullException(nameof(scrollOrigin));
-        }
+        ArgumentNullException.ThrowIfNull(scrollOrigin);
 
         if (scrollOrigin.Viewport && scrollOrigin.Element != null)
         {
diff --git a/dotnet/src/webdriver/Interactions/WheelInputDevice.cs b/dotnet/src/webdriver/Interactions/WheelInputDevice.cs
index daa7ea285ee2a..6ff0d3a5694e2 100644
--- a/dotnet/src/webdriver/Interactions/WheelInputDevice.cs
+++ b/dotnet/src/webdriver/Interactions/WheelInputDevice.cs
@@ -90,10 +90,7 @@ public Interaction CreateWheelScroll(int deltaX, int deltaY, TimeSpan duration)
     /// <exception cref="ArgumentNullException">If <paramref name="target"/> is <see langword="null"/>.</exception>
     public Interaction CreateWheelScroll(IWebElement target, int xOffset, int yOffset, int deltaX, int deltaY, TimeSpan duration)
     {
-        if (target is null)
-        {
-            throw new ArgumentNullException(nameof(target));
-        }
+        ArgumentNullException.ThrowIfNull(target);
 
         return new WheelScrollInteraction(this, target, CoordinateOrigin.Element, xOffset, yOffset, deltaX, deltaY, duration);
     }
diff --git a/dotnet/src/webdriver/Internal/Logging/LogContext.cs b/dotnet/src/webdriver/Internal/Logging/LogContext.cs
index 5bb8ed5359e98..01ec992f8a907 100644
--- a/dotnet/src/webdriver/Internal/Logging/LogContext.cs
+++ b/dotnet/src/webdriver/Internal/Logging/LogContext.cs
@@ -80,10 +80,7 @@ public ILogger GetLogger<T>()
 
     public ILogger GetLogger(Type type)
     {
-        if (type == null)
-        {
-            throw new ArgumentNullException(nameof(type));
-        }
+        ArgumentNullException.ThrowIfNull(type);
 
         _loggers ??= new ConcurrentDictionary<Type, ILogger>();
 
diff --git a/dotnet/src/webdriver/JavaScriptEngine.cs b/dotnet/src/webdriver/JavaScriptEngine.cs
index 86f20c64c6f2c..06929d42a3766 100644
--- a/dotnet/src/webdriver/JavaScriptEngine.cs
+++ b/dotnet/src/webdriver/JavaScriptEngine.cs
@@ -166,15 +166,9 @@ public async Task DisableDomMutationMonitoring()
     /// <exception cref="ArgumentNullException">If <paramref name="scriptName"/> or <paramref name="script"/> are <see langword="null"/>.</exception>
     public async Task<InitializationScript> AddInitializationScript(string scriptName, [StringSyntax(StringSyntaxConstants.JavaScript)] string script)
     {
-        if (scriptName is null)
-        {
-            throw new ArgumentNullException(nameof(scriptName));
-        }
+        ArgumentNullException.ThrowIfNull(scriptName);
 
-        if (script is null)
-        {
-            throw new ArgumentNullException(nameof(script));
-        }
+        ArgumentNullException.ThrowIfNull(script);
 
         if (this.initializationScripts.TryGetValue(scriptName, out InitializationScript? existingScript))
         {
@@ -198,10 +192,7 @@ public async Task<InitializationScript> AddInitializationScript(string scriptNam
     /// <exception cref="ArgumentNullException">If <paramref name="scriptName"/> is <see langword="null"/>.</exception>
     public async Task RemoveInitializationScript(string scriptName)
     {
-        if (scriptName is null)
-        {
-            throw new ArgumentNullException(nameof(scriptName));
-        }
+        ArgumentNullException.ThrowIfNull(scriptName);
 
         if (this.initializationScripts.TryGetValue(scriptName, out InitializationScript? script))
         {
@@ -235,10 +226,7 @@ public async Task ClearInitializationScripts()
     /// <exception cref="ArgumentNullException">If <paramref name="script"/> is <see langword="null"/>.</exception>
     public async Task<PinnedScript> PinScript([StringSyntax(StringSyntaxConstants.JavaScript)] string script)
     {
-        if (script == null)
-        {
-            throw new ArgumentNullException(nameof(script));
-        }
+        ArgumentNullException.ThrowIfNull(script);
 
         string newScriptHandle = Guid.NewGuid().ToString("N");
 
@@ -263,10 +251,7 @@ public async Task<PinnedScript> PinScript([StringSyntax(StringSyntaxConstants.Ja
     /// <exception cref="ArgumentNullException">If <paramref name="script"/> is <see langword="null"/>.</exception>
     public async Task UnpinScript(PinnedScript script)
     {
-        if (script == null)
-        {
-            throw new ArgumentNullException(nameof(script));
-        }
+        ArgumentNullException.ThrowIfNull(script);
 
         if (this.pinnedScripts.ContainsKey(script.Handle))
         {
@@ -286,10 +271,7 @@ public async Task UnpinScript(PinnedScript script)
     /// <exception cref="ArgumentException">If A binding with the specified name already exists.</exception>
     public async Task AddScriptCallbackBinding(string bindingName)
     {
-        if (bindingName is null)
-        {
-            throw new ArgumentNullException(nameof(bindingName));
-        }
+        ArgumentNullException.ThrowIfNull(bindingName);
 
         if (!this.bindings.Add(bindingName))
         {
@@ -308,10 +290,7 @@ public async Task AddScriptCallbackBinding(string bindingName)
     /// <exception cref="ArgumentNullException">If <paramref name="bindingName"/> is <see langword="null"/>.</exception>
     public async Task RemoveScriptCallbackBinding(string bindingName)
     {
-        if (bindingName is null)
-        {
-            throw new ArgumentNullException(nameof(bindingName));
-        }
+        ArgumentNullException.ThrowIfNull(bindingName);
 
         await this.session.Value.Domains.JavaScript.RemoveBinding(bindingName).ConfigureAwait(false);
         _ = this.bindings.Remove(bindingName);
diff --git a/dotnet/src/webdriver/Logs.cs b/dotnet/src/webdriver/Logs.cs
index f72f194ad5d9d..90f9800370cc4 100644
--- a/dotnet/src/webdriver/Logs.cs
+++ b/dotnet/src/webdriver/Logs.cs
@@ -77,10 +77,7 @@ public ReadOnlyCollection<string> AvailableLogTypes
     /// <exception cref="ArgumentNullException">If <paramref name="logKind"/> is <see langword="null"/>.</exception>
     public ReadOnlyCollection<LogEntry> GetLog(string logKind)
     {
-        if (logKind is null)
-        {
-            throw new ArgumentNullException(nameof(logKind));
-        }
+        ArgumentNullException.ThrowIfNull(logKind);
 
         List<LogEntry> entries = new List<LogEntry>();
 
diff --git a/dotnet/src/webdriver/Properties/ArgumentNullExceptionExtensions.cs b/dotnet/src/webdriver/Properties/ArgumentNullExceptionExtensions.cs
new file mode 100644
index 0000000000000..830458e1c726e
--- /dev/null
+++ b/dotnet/src/webdriver/Properties/ArgumentNullExceptionExtensions.cs
@@ -0,0 +1,38 @@
+// <copyright file="ArgumentNullExceptionExtensions.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+
+namespace System;
+
+internal static class ArgumentNullExceptionExtensions
+{
+    extension(ArgumentNullException)
+    {
+        public static void ThrowIfNull([NotNull] object? arg, [CallerArgumentExpression(nameof(arg))] string paramName = "")
+        {
+            if (arg is null)
+            {
+                throw new ArgumentNullException(paramName);
+            }
+        }
+    }
+}
+
diff --git a/dotnet/src/webdriver/Properties/CallerArgumentExpressionAttribute.cs b/dotnet/src/webdriver/Properties/CallerArgumentExpressionAttribute.cs
new file mode 100644
index 0000000000000..0fda050aa38a5
--- /dev/null
+++ b/dotnet/src/webdriver/Properties/CallerArgumentExpressionAttribute.cs
@@ -0,0 +1,29 @@
+// <copyright file="CallerArgumentExpressionAttribute.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+namespace System.Runtime.CompilerServices;
+
+#if !NET8_0_OR_GREATER
+
+internal class CallerArgumentExpressionAttribute(string paramName) : Attribute
+{
+    public string ParamName = paramName;
+}
+
+#endif
diff --git a/dotnet/src/webdriver/Remote/HttpCommandExecutor.cs b/dotnet/src/webdriver/Remote/HttpCommandExecutor.cs
index 13b50064436eb..c0c8fe58e928e 100644
--- a/dotnet/src/webdriver/Remote/HttpCommandExecutor.cs
+++ b/dotnet/src/webdriver/Remote/HttpCommandExecutor.cs
@@ -385,10 +385,7 @@ private class HttpRequestInfo
     {
         public HttpRequestInfo(Uri serverUri, Command commandToExecute, HttpCommandInfo commandInfo)
         {
-            if (commandInfo is null)
-            {
-                throw new ArgumentNullException(nameof(commandInfo));
-            }
+            ArgumentNullException.ThrowIfNull(commandInfo);
 
             this.FullUri = commandInfo.CreateCommandUri(serverUri, commandToExecute);
             this.HttpMethod = commandInfo.Method;
@@ -424,10 +421,7 @@ private class DiagnosticsHttpHandler : DelegatingHandler
         public DiagnosticsHttpHandler(HttpMessageHandler messageHandler, ILogger logger)
             : base(messageHandler)
         {
-            if (messageHandler is null)
-            {
-                throw new ArgumentNullException(nameof(messageHandler));
-            }
+            ArgumentNullException.ThrowIfNull(messageHandler);
 
             _logger = logger ?? throw new ArgumentNullException(nameof(logger));
         }
diff --git a/dotnet/src/webdriver/Remote/RemoteWebDriver.cs b/dotnet/src/webdriver/Remote/RemoteWebDriver.cs
index a71f985af1aa7..b478c02be4b4a 100644
--- a/dotnet/src/webdriver/Remote/RemoteWebDriver.cs
+++ b/dotnet/src/webdriver/Remote/RemoteWebDriver.cs
@@ -448,10 +448,7 @@ public DevToolsSession GetDevToolsSession()
     [RequiresDynamicCode(DevToolsSession.CDP_AOTIncompatibilityMessage)]
     public DevToolsSession GetDevToolsSession(DevToolsOptions options)
     {
-        if (options is null)
-        {
-            throw new ArgumentNullException(nameof(options));
-        }
+        ArgumentNullException.ThrowIfNull(options);
 
         if (this.devToolsSession == null)
         {
diff --git a/dotnet/src/webdriver/Safari/SafariDriver.cs b/dotnet/src/webdriver/Safari/SafariDriver.cs
index 8b84b657072f9..930acb51c06df 100644
--- a/dotnet/src/webdriver/Safari/SafariDriver.cs
+++ b/dotnet/src/webdriver/Safari/SafariDriver.cs
@@ -167,15 +167,9 @@ public SafariDriver(SafariDriverService service, SafariOptions options, TimeSpan
     /// <returns></returns>
     private static ICommandExecutor GenerateDriverServiceCommandExecutor(DriverService service, DriverOptions options, TimeSpan commandTimeout)
     {
-        if (service is null)
-        {
-            throw new ArgumentNullException(nameof(service));
-        }
+        ArgumentNullException.ThrowIfNull(service);
 
-        if (options is null)
-        {
-            throw new ArgumentNullException(nameof(options));
-        }
+        ArgumentNullException.ThrowIfNull(options);
 
         if (service.DriverServicePath == null)
         {
diff --git a/dotnet/src/webdriver/Selenium.WebDriver.csproj b/dotnet/src/webdriver/Selenium.WebDriver.csproj
index e68638772ef22..ad09dfe5dc63a 100644
--- a/dotnet/src/webdriver/Selenium.WebDriver.csproj
+++ b/dotnet/src/webdriver/Selenium.WebDriver.csproj
@@ -4,7 +4,7 @@
     <TargetFrameworks>net462;netstandard2.0;net8.0;</TargetFrameworks>
     <AssemblyName>WebDriver</AssemblyName>
     <RootNamespace>OpenQA.Selenium</RootNamespace>
-    <LangVersion>12.0</LangVersion>
+    <LangVersion>14.0</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
diff --git a/dotnet/src/webdriver/TargetLocator.cs b/dotnet/src/webdriver/TargetLocator.cs
index 263dca0fe19a7..3d92e674815e9 100644
--- a/dotnet/src/webdriver/TargetLocator.cs
+++ b/dotnet/src/webdriver/TargetLocator.cs
@@ -137,10 +137,7 @@ public IWebDriver ParentFrame()
     /// <exception cref="ArgumentNullException">If <paramref name="windowHandleOrName"/> is <see langword="null"/>.</exception>
     public IWebDriver Window(string windowHandleOrName)
     {
-        if (windowHandleOrName is null)
-        {
-            throw new ArgumentNullException(nameof(windowHandleOrName));
-        }
+        ArgumentNullException.ThrowIfNull(windowHandleOrName);
 
         Dictionary<string, object> parameters = new Dictionary<string, object>();
         parameters.Add("handle", windowHandleOrName);
diff --git a/dotnet/src/webdriver/WebDriver.cs b/dotnet/src/webdriver/WebDriver.cs
index 45181ed88a2c0..446afd75b52b1 100644
--- a/dotnet/src/webdriver/WebDriver.cs
+++ b/dotnet/src/webdriver/WebDriver.cs
@@ -259,10 +259,7 @@ public void Dispose()
     /// <exception cref="ArgumentNullException">If <paramref name="script" /> is <see langword="null"/>.</exception>
     public object? ExecuteScript(PinnedScript script, params object?[]? args)
     {
-        if (script == null)
-        {
-            throw new ArgumentNullException(nameof(script));
-        }
+        ArgumentNullException.ThrowIfNull(script);
 
         return this.ExecuteScript(script.MakeExecutionScript(), args);
     }
@@ -365,10 +362,7 @@ public Screenshot GetScreenshot()
     /// <exception cref="ArgumentNullException">If <paramref name="printOptions"/> is <see langword="null"/>.</exception>
     public PrintDocument Print(PrintOptions printOptions)
     {
-        if (printOptions is null)
-        {
-            throw new ArgumentNullException(nameof(printOptions));
-        }
+        ArgumentNullException.ThrowIfNull(printOptions);
 
         Response commandResponse = this.Execute(DriverCommand.Print, printOptions.ToDictionary());
 
@@ -649,10 +643,7 @@ protected void StartSession(ICapabilities capabilities)
     /// <exception cref="ArgumentNullException">If <paramref name="capabilitiesToConvert"/> is <see langword="null"/>.</exception>
     protected virtual Dictionary<string, object> GetCapabilitiesDictionary(ICapabilities capabilitiesToConvert)
     {
-        if (capabilitiesToConvert is null)
-        {
-            throw new ArgumentNullException(nameof(capabilitiesToConvert));
-        }
+        ArgumentNullException.ThrowIfNull(capabilitiesToConvert);
 
         Dictionary<string, object> capabilitiesDictionary = new Dictionary<string, object>();
 
@@ -999,10 +990,7 @@ private static void UnpackAndThrowOnError(Response errorResponse, string command
     /// <exception cref="ArgumentNullException">If <paramref name="options"/> is <see langword="null"/>.</exception>
     public string AddVirtualAuthenticator(VirtualAuthenticatorOptions options)
     {
-        if (options is null)
-        {
-            throw new ArgumentNullException(nameof(options));
-        }
+        ArgumentNullException.ThrowIfNull(options);
 
         Response commandResponse = this.Execute(DriverCommand.AddVirtualAuthenticator, options.ToDictionary());
 
@@ -1019,10 +1007,7 @@ public string AddVirtualAuthenticator(VirtualAuthenticatorOptions options)
     /// <exception cref="ArgumentNullException">If <paramref name="authenticatorId"/> is <see langword="null"/>.</exception>
     public void RemoveVirtualAuthenticator(string authenticatorId)
     {
-        if (authenticatorId is null)
-        {
-            throw new ArgumentNullException(nameof(authenticatorId));
-        }
+        ArgumentNullException.ThrowIfNull(authenticatorId);
 
         Dictionary<string, object> parameters = new Dictionary<string, object>();
         parameters.Add("authenticatorId", authenticatorId);
@@ -1044,10 +1029,7 @@ public void RemoveVirtualAuthenticator(string authenticatorId)
     /// <exception cref="InvalidOperationException">If a Virtual Authenticator has not been added yet.</exception>
     public void AddCredential(Credential credential)
     {
-        if (credential is null)
-        {
-            throw new ArgumentNullException(nameof(credential));
-        }
+        ArgumentNullException.ThrowIfNull(credential);
 
         string authenticatorId = this.AuthenticatorId ?? throw new InvalidOperationException("Virtual Authenticator needs to be added before it can perform operations");
 
@@ -1106,10 +1088,7 @@ public void RemoveCredential(byte[] credentialId)
     /// <exception cref="InvalidOperationException">If a Virtual Authenticator has not been added yet.</exception>
     public void RemoveCredential(string credentialId)
     {
-        if (credentialId is null)
-        {
-            throw new ArgumentNullException(nameof(credentialId));
-        }
+        ArgumentNullException.ThrowIfNull(credentialId);
 
         string authenticatorId = this.AuthenticatorId ?? throw new InvalidOperationException("Virtual Authenticator needs to be added before it can perform operations");