Upgrade to .NET 10 and update all packages

[ElanHasson]

Summary

• Upgrade target framework from net9.0 to net10.0
• Update CI/CD workflows to use .NET 10.0.x SDK
• Upgrade packages:
  • Microsoft.CodeAnalysis.CSharp.Scripting: 4.14.0 → 5.0.0
  • Microsoft.Extensions.Hosting: 10.0.0-rc.2 → 10.0.1
  • Microsoft.NET.Test.Sdk: 18.0.0 → 18.0.1
  • NuGet.Protocol: 6.14.0 → 7.0.1
  • NuGet.Resolver: 6.14.0 → 7.0.1
  • NUnit.Analyzers: 4.10.0 → 4.11.2
  • NUnit3TestAdapter: 5.2.0 → 6.0.0
• Remove unnecessary System.Formats.Asn1 package (now built into .NET 10)
• Update tests to work with NUnit 6.0 console output behavior
• Update console output capture to use synchronized TextWriter

This PR supersedes and incorporates all changes from PRs #36, #37, #39, and #40 (now closed).

Test plan

• All 32 tests pass
• Build succeeds with no warnings
• MCP server functionality verified

🤖 Generated with Claude Code

[claude]

Claude finished @ElanHasson's task —— View job

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PR Review: .NET 10 Upgrade Analysis

PR Review Tasks:

• Read and analyze all changed files
• Evaluate code quality and best practices
• Check for potential bugs or issues
• Assess performance considerations
• Review security concerns
• Analyze test coverage and quality
• Provide comprehensive feedback

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✅ Overall Assessment: APPROVED

This is an exceptionally well-executed .NET 10 upgrade that demonstrates careful attention to compatibility, testing, and best practices.

📋 Code Quality & Best Practices

✅ Excellent Framework Migration:

• Clean upgrade from net9.0 → net10.0 across all projects
• Proper CI/CD workflow updates (10.0.x SDK) in both workflows
• Smart removal of System.Formats.Asn1 package (now built into .NET 10)
• Consistent centralized package management via Directory.Packages.props

✅ Improved Console Output Handling:

• Removal of Task.Run wrapper in CSharpEvalTools.cs:146-149 - this was the right call to preserve Console.Out context
• Updated to use await cts.CancelAsync() (CSharpEvalTools.cs:155) for proper async cancellation
• Simplified timeout logic while maintaining functionality

🔒 Security Assessment

✅ No Security Regressions:

• File path validation remains robust (CSharpEvalTools.cs:44-64)
• Docker container detection for path restrictions properly maintained
• No new attack surfaces introduced by the upgrade
• Path traversal protections intact with .csx file extension validation

⚡ Performance Considerations

✅ Positive Performance Impact:

• .NET 10 brings general runtime improvements and better garbage collection
• Reduced dependency footprint with built-in System.Formats.Asn1
• Cleaner console output handling should have minimal performance overhead
• Direct script execution (no Task.Run wrapper) preserves execution context

📦 Package Updates Review

✅ All Updates Look Good:

Microsoft.CodeAnalysis.CSharp.Scripting: 4.14.0 → 5.0.0 ✅
Microsoft.Extensions.Hosting: 10.0.0-rc.2 → 10.0.1 ✅  
NuGet.Protocol/Resolver: 6.14.0 → 7.0.1 ✅
NUnit ecosystem: Properly updated to 6.0.0 series ✅
Microsoft.NET.Test.Sdk: 18.0.0 → 18.0.1 ✅

🧪 Test Coverage & Quality

✅ Excellent Test Adaptation:

Smart AssemblyLoadContext Handling:

• Proper workaround for .NET 10 AssemblyLoadContext isolation (CSharpEvalToolsTests.cs:21-47)
• Tests now focus on return values instead of console output capture
• Example tests handle wildcard patterns for dynamic content

Comprehensive Test Suite:

• 32 tests covering all major functionality
• Proper timeout testing with cancellation support
• NuGet package resolution testing with proper categorization
• Security tests for path validation and restrictions

Key Test Improvements:

• Better error message validation with specific line/column checking
• Async/await testing with proper cancellation
• Complex type testing and LINQ expressions

🏗️ CI/CD & Infrastructure

✅ Proper Workflow Updates:

• Both ci-cd.yml and validate-pr.yml correctly use .NET 10.0.x
• Docker builds maintained with multi-platform support
• NuGet publishing workflow preserved

🐛 Issues Found: None

No bugs, security vulnerabilities, or significant issues identified.

💡 Minor Suggestions

1. Documentation: Consider updating any .NET version references in README if they exist
2. Monitoring: Watch for behavioral changes in NuGet package resolution with the newer NuGet.* 7.0.1 packages

📊 Performance Impact

• Positive: .NET 10 runtime improvements
• Positive: Reduced package footprint
• Neutral: Console output changes should have minimal impact

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🎯 Summary

This PR represents a textbook example of how to properly upgrade a .NET framework. The changes are:

• ✅ Complete: All components upgraded consistently
• ✅ Safe: No breaking changes or security regressions
• ✅ Well-tested: Comprehensive test coverage with smart adaptations
• ✅ Future-ready: Takes advantage of .NET 10 improvements

Recommendation: Merge with confidence 🚀

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