[dotnet] Annotate nullability on DevToolsSession

[RenderMichael]

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Annotates nullability on DevToolsSession and modifies nullability on related types.

Motivation and Context

Contributes to #14640

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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PR Type

Enhancement, Bug fix

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Description

• Annotated nullability for DevToolsSession and related classes.

• Fixed typos and improved comments/documentation for clarity.

• Enhanced error handling and logging in DevToolsSession.

• Refactored code to ensure null safety and modernized syntax.

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Changes walkthrough 📝

	Relevant files
Documentation	DevToolsCommandData.cs Fix typos and improve constructor documentation                    dotnet/src/webdriver/DevTools/DevToolsCommandData.cs Fixed typos in parameter documentation. Improved exception documentation for constructors. +2/-2
Enhancement	DevToolsSession.cs Annotate nullability and improve error handling                    dotnet/src/webdriver/DevTools/DevToolsSession.cs Enabled nullable reference types. Annotated fields, properties, and methods for nullability. Fixed typos and improved logging messages. Enhanced error handling and refactored methods for null safety. +73/-77  DevToolsSessionLogMessageEventArgs.cs Support nullable arguments in constructor                                dotnet/src/webdriver/DevTools/DevToolsSessionLogMessageEventArgs.cs Updated constructor to support nullable arguments. +1/-1      DevToolsVersionInfo.cs Simplify regex and improve error handling                                dotnet/src/webdriver/DevTools/DevToolsVersionInfo.cs Simplified regex usage for version parsing. Improved error handling for invalid version strings. +2/-4      IDevToolsSession.cs Annotate nullability and fix documentation typos                  dotnet/src/webdriver/DevTools/IDevToolsSession.cs Enabled nullable reference types. Annotated methods and events for nullability. Fixed typos in documentation. +8/-6

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[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 4 🔵🔵🔵🔵⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Null Safety The Domains property is marked as non-null but initialized as null with a TODO comment. This could lead to NullReferenceException if accessed before initialization. public DevToolsDomains Domains { get; private set; } = null!; // TODO handle nullability for this Error Handling The ProcessMessage method assumes messageObject.GetProperty("method") will return a non-null string without proper validation, which could cause runtime errors. var method = methodProperty.GetString() ?? throw new InvalidOperationException("CDP message contained \"method\" property with a value of \"null\".");

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Prevent potential shutdown deadlock The ShutdownMessageQueue method has an infinite loop condition that depends on a connection that was already closed. This could lead to a deadlock. Consider adding a timeout or using a more reliable shutdown condition. dotnet/src/webdriver/DevTools/DevToolsSession.cs [515-518] -while (connection.IsActive) +using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(30)); +while (connection.IsActive && !cts.Token.IsCancellationRequested) { - await Task.Delay(TimeSpan.FromMilliseconds(10)); + await Task.Delay(TimeSpan.FromMilliseconds(10), cts.Token); } Apply this suggestion Suggestion importance[1-10]: 9 __ Why: The suggestion fixes a critical issue where the shutdown process could hang indefinitely. Adding a timeout with proper cancellation support ensures the application can gracefully terminate.	High
	Fix potential null reference issue The Domains property is initialized with null! and marked with a TODO comment. This could lead to NullReferenceException if accessed before initialization. Consider initializing it in the constructor or making it truly nullable. dotnet/src/webdriver/DevTools/DevToolsSession.cs [120] -public DevToolsDomains Domains { get; private set; } = null!; // TODO handle nullability for this +public DevToolsDomains? Domains { get; private set; } Apply this suggestion Suggestion importance[1-10]: 8 __ Why: The suggestion addresses a critical issue where using null! with a TODO comment could lead to runtime NullReferenceExceptions. Making the property nullable with proper initialization would prevent potential crashes.	Medium

[RenderMichael]

Test failures are unrelated to this PR

//java/test/org/openqa/selenium/mobile:NetworkConnectionTest
//java/test/org/openqa/selenium/remote:RemoteWebDriverScreenshotTest
//java/test/org/openqa/selenium/remote:RemoteWebDriverScreenshotTest-firefox-beta
//rb/spec/integration/selenium/webdriver:network-firefox-beta-bidi
//rb/spec/integration/selenium/webdriver:network-firefox-bidi