[dotnet] Optimize reflection in JsonEnumMemberConverter

[RenderMichael]

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Optimize reflection in JsonEnumMemberConverter

Motivation and Context

Reflection optimization

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

• Optimized reflection in JsonEnumMemberConverter for better performance.

• Added conditional compilation for .NET 8.0 or greater compatibility.

• Changed GetMember to GetField for retrieving enum metadata.

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Changes walkthrough 📝

Relevant files

Enhancement

JsonEnumMemberConverter.cs Optimize reflection and improve compatibility in JsonEnumMemberConverter dotnet/src/webdriver/DevTools/Json/JsonEnumMemberConverter.cs Made the class JsonEnumMemberConverter sealed for better performance. Added conditional compilation to support .NET 8.0 or greater. Replaced GetMember with GetField for enum metadata retrieval. Improved type constraints for TEnum to ensure stricter type safety. +8/-4

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[qodo-merge-pro]

PR Reviewer Guide 🔍

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

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Null Reference The GetField() call could return null for invalid enum values, which should be handled to avoid NullReferenceException var enumMember = type.GetField(value.ToString());

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible issue	Validate reflection field lookup result Add null check for GetField() result as it may return null for invalid enum values dotnet/src/webdriver/DevTools/Json/JsonEnumMemberConverter.cs [45] -var enumMember = type.GetField(value.ToString()); +var enumMember = type.GetField(value.ToString()) ?? throw new ArgumentException($"Invalid enum value: {value}"); Apply this suggestion Suggestion importance[1-10]: 7 Why: Adding a null check for GetField() with an explicit exception is important as it provides better error handling and debugging information when invalid enum values are encountered.	7
	Add null check for reflection safety Add null check for enumMember.GetCustomAttributes() result to prevent potential NullReferenceException when casting to EnumMemberAttribute dotnet/src/webdriver/DevTools/Json/JsonEnumMemberConverter.cs [46-48] -var attr = enumMember.GetCustomAttributes(typeof(EnumMemberAttribute), false) - .Cast<EnumMemberAttribute>() - .FirstOrDefault(); +var attributes = enumMember.GetCustomAttributes(typeof(EnumMemberAttribute), false); +var attr = attributes != null ? attributes.Cast<EnumMemberAttribute>().FirstOrDefault() : null; Apply this suggestion Suggestion importance[1-10]: 4 Why: While GetCustomAttributes() rarely returns null in practice, adding a null check improves robustness. However, the impact is low as this is a defensive programming measure for an unlikely scenario.	4