[dotnet] Modernize Response type

[RenderMichael]

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Description

Modernizes the Response class, in preparation for making it null-safe. I separated this out into a separate PR because the diffs were becoming unwieldy. The changes in this PR may be uncontroversial, and should be considered separate from any other changes to it.

Motivation and Context

This simplifies and shrinks the code.

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

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Description

• Modernized the Response class by removing redundant fields and using auto-properties, which simplifies the code and reduces its size.
• Improved null handling in JSON deserialization methods to prevent potential null reference exceptions.
• Simplified the constructor logic for setting properties, enhancing code readability and maintainability.
• Updated error handling in the FromErrorJson method to use the new Response constructor, ensuring consistent error response creation.
• Simplified error handling in the ExecuteAsync method of WebDriver by utilizing the new Response constructor for error responses.

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Changes walkthrough 📝

Relevant files

Enhancement

Response.cs Modernize and simplify the `Response` class in WebDriver  dotnet/src/webdriver/Response.cs Modernized the Response class by removing redundant fields and using auto-properties. Improved null handling in JSON deserialization methods. Simplified constructor logic for setting properties. Updated error handling in FromErrorJson method. +32/-50  WebDriver.cs Simplify error handling in WebDriver's ExecuteAsync method dotnet/src/webdriver/WebDriver.cs Simplified error handling in ExecuteAsync method. Utilized new Response constructor for error responses. +1/-5

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[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Null Handling The new null handling in FromJson and FromErrorJson methods throws exceptions for null responses. Verify this is the intended behavior and won't break existing code. Property Access The change from private fields to auto-properties could potentially impact serialization behavior. Verify serialization/deserialization still works as expected.

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible issue	Add parameter validation to prevent null reference exceptions Add null check for rawResponse parameter in the private constructor to prevent potential NullReferenceException when accessing dictionary keys. dotnet/src/webdriver/Response.cs [65-72] private Response(Dictionary<string, object> rawResponse) { + if (rawResponse == null) + throw new ArgumentNullException(nameof(rawResponse)); + if (rawResponse.ContainsKey("sessionId")) { if (rawResponse["sessionId"] != null) Apply this suggestion Suggestion importance[1-10]: 8 Why: Adding null validation for the rawResponse parameter is important for preventing NullReferenceException and providing clear error messages. This is a critical defensive programming practice for a core constructor.	8
Security	Prevent runtime modification of shared serialization settings Make the s_jsonSerializerOptions field read-only to prevent accidental modification of serialization settings at runtime. dotnet/src/webdriver/Response.cs [34-38] -private static readonly JsonSerializerOptions s_jsonSerializerOptions = new() +private static readonly JsonSerializerOptions s_jsonSerializerOptions = new(JsonSerializerOptions.Default) { TypeInfoResolver = ResponseJsonSerializerContext.Default, Converters = { new ResponseValueJsonConverter() } -}; +}.MakeReadOnly(); Apply this suggestion Suggestion importance[1-10]: 7 Why: Making the JsonSerializerOptions immutable through MakeReadOnly() prevents accidental modifications to shared serialization settings that could affect the entire application's behavior. This is an important security and reliability improvement.	7

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[nvborisenko]

Thank you @RenderMichael !