[dotnet] Migrate solution file to new .slnx format

[RenderMichael]

User description

Some minor modernization

🔗 Related Issues

💥 What does this PR do?

🔧 Implementation Notes

💡 Additional Considerations

🔄 Types of changes

• Cleanup (formatting, renaming)

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PR Type

Other

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Description

• Migrate .NET solution files from legacy .sln to modern .slnx format

• Replace old Visual Studio solution format with simplified XML-based format

• Update .gitattributes to reference .slnx instead of .sln

• Modernize two solution files: main Selenium and DevTools generator

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Diagram Walkthrough

flowchart LR
  oldSln["Legacy .sln files<br/>Selenium.sln<br/>DevToolsProtocolGenerator.sln"]
  newSlnx["Modern .slnx files<br/>Selenium.slnx<br/>DevToolsProtocolGenerator.slnx"]
  gitattr[".gitattributes<br/>updated reference"]
  oldSln -- "migrate to" --> newSlnx
  gitattr -- "updated to" --> newSlnx

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File Walkthrough

	Relevant files
Configuration changes	.gitattributes Update solution file pattern reference                                      .gitattributes Updated file pattern from *.sln to *.slnx for merge strategy configuration Maintains same merge and EOL settings for new solution file format +1/-1
Miscellaneous	Selenium.sln Remove legacy solution file                                                            dotnet/Selenium.sln Removed legacy Visual Studio solution file (79 lines) Contained project references and configuration for 10 projects Replaced by new .slnx format file +0/-79    DevToolsProtocolGenerator.sln Remove legacy DevTools solution file                                          third_party/dotnet/devtools/DevToolsProtocolGenerator.sln Removed legacy Visual Studio solution file (25 lines) Contained single DevToolsGenerator project reference Replaced by new .slnx format file +0/-25
Enhancement	Selenium.slnx Add modern solution file format                                                    dotnet/Selenium.slnx Created new modern XML-based solution file References all 10 projects in simplified format Includes WebDriver, Support, and test projects for all browsers +12/-0    DevToolsProtocolGenerator.slnx Add modern DevTools solution file                                                third_party/dotnet/devtools/DevToolsProtocolGenerator.slnx Created new modern XML-based solution file References DevToolsGenerator project in simplified format +3/-0

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[qodo-merge-pro]

PR Compliance Guide 🔍

Below is a summary of compliance checks for this PR:

Security Compliance
🟢	No security concerns identified No security vulnerabilities detected by AI analysis. Human verification advised for critical code.
Ticket Compliance
🟡	🎫 #5678 🔴 Investigate and resolve repeated "Error: ConnectFailure (Connection refused)" when instantiating multiple ChromeDriver instances on Ubuntu 16.04 with Selenium 3.9.0 and ChromeDriver 2.35. Ensure subsequent ChromeDriver instantiations do not produce connection failures after the first successful instance. Provide steps or code changes that address the networking/connection refusal issue in ChromeDriver initialization.
🟡	🎫 #1234 🔴 Ensure WebDriver click() triggers JavaScript in link href in Firefox (regression from 2.47.1 to 2.48.x). Provide fixes or tests validating alert is triggered when clicking links with javascript: href.
Codebase Duplication Compliance
⚪	Codebase context is not defined Follow the guide to enable codebase context checks.
Custom Compliance
🟢	Generic: Meaningful Naming and Self-Documenting Code Objective: Ensure all identifiers clearly express their purpose and intent, making code self-documenting Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Error Handling Objective: To prevent the leakage of sensitive system information through error messages while providing sufficient detail for internal debugging. Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Logging Practices Objective: To ensure logs are useful for debugging and auditing without exposing sensitive information like PII, PHI, or cardholder data. Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
⚪	Generic: Comprehensive Audit Trails Objective: To create a detailed and reliable record of critical system actions for security analysis and compliance. Status: Out of scope: The PR only updates solution and attributes files with no runtime logic, so there are no critical actions to log in the added lines. Referred Code *.slnx text merge=union eol=crlf Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Robust Error Handling and Edge Case Management Objective: Ensure comprehensive error handling that provides meaningful context and graceful degradation Status: No error paths: The added files are solution metadata without executable logic, so there are no failure points or edge cases to handle within the diff. Referred Code <Solution> <Project Path="src/support/Selenium.WebDriver.Support.csproj" /> <Project Path="src/webdriver/Selenium.WebDriver.csproj" /> <Project Path="test/chrome/Selenium.WebDriver.Chrome.Tests.csproj" /> <Project Path="test/common/Selenium.WebDriver.Common.Tests.csproj" /> <Project Path="test/edge/Selenium.WebDriver.Edge.Tests.csproj" /> <Project Path="test/firefox/Selenium.WebDriver.Firefox.Tests.csproj" /> <Project Path="test/ie/Selenium.WebDriver.IE.Tests.csproj" /> <Project Path="test/remote/Selenium.WebDriver.Remote.Tests.csproj" /> <Project Path="test/safari/Selenium.WebDriver.Safari.Tests.csproj" /> <Project Path="test/support/Selenium.WebDriver.Support.Tests.csproj" /> </Solution> Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Security-First Input Validation and Data Handling Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent vulnerabilities Status: No inputs added: The changes only add solution references and do not introduce input handling code, so validation concerns are not applicable in this diff. Referred Code <Solution> <Project Path="src/generator/DevToolsGenerator.csproj" /> </Solution> Learn more about managing compliance generic rules or creating your own custom rules
Update

Compliance status legend

🟢 - Fully Compliant
🟡 - Partial Compliant
🔴 - Not Compliant
⚪ - Requires Further Human Verification
🏷️ - Compliance label

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
High-level	Consider implications of replacing .sln files Replacing .sln files with .slnx removes explicit build configurations, which can break development and CI build processes. It is crucial to evaluate the impact of this change before merging. Examples: dotnet/Selenium.slnx [1-12] <Solution> <Project Path="src/support/Selenium.WebDriver.Support.csproj" /> <Project Path="src/webdriver/Selenium.WebDriver.csproj" /> <Project Path="test/chrome/Selenium.WebDriver.Chrome.Tests.csproj" /> <Project Path="test/common/Selenium.WebDriver.Common.Tests.csproj" /> <Project Path="test/edge/Selenium.WebDriver.Edge.Tests.csproj" /> <Project Path="test/firefox/Selenium.WebDriver.Firefox.Tests.csproj" /> <Project Path="test/ie/Selenium.WebDriver.IE.Tests.csproj" /> <Project Path="test/remote/Selenium.WebDriver.Remote.Tests.csproj" /> <Project Path="test/safari/Selenium.WebDriver.Safari.Tests.csproj" /> ... (clipped 2 lines) third_party/dotnet/devtools/DevToolsProtocolGenerator.slnx [1-3] <Solution> <Project Path="src/generator/DevToolsGenerator.csproj" /> </Solution> Solution Walkthrough: Before: // dotnet/Selenium.sln Microsoft Visual Studio Solution File... Project("{...}") = "Selenium.WebDriver", "src\webdriver\Selenium.WebDriver.csproj", "{...}" ... Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug|Any CPU = Debug|Any CPU Release|Any CPU = Release|Any CPU EndGlobalSection GlobalSection(ProjectConfigurationPlatforms) = postSolution {...}.Debug|Any CPU.ActiveCfg = Debug|Any CPU ... EndGlobalSection ... EndGlobal After: // dotnet/Selenium.slnx <Solution> <Project Path="src/support/Selenium.WebDriver.Support.csproj" /> <Project Path="src/webdriver/Selenium.WebDriver.csproj" /> <Project Path="test/chrome/Selenium.WebDriver.Chrome.Tests.csproj" /> ... </Solution> Suggestion importance[1-10]: 9 __ Why: The suggestion correctly identifies a critical risk that replacing .sln with .slnx files removes explicit build configurations, which could break existing build and development workflows.	High
Learned best practice	Add XML header and version Add an XML declaration and optional version attribute to clarify encoding and format version for tooling and maintainers. dotnet/Selenium.slnx [1-12] -<Solution> +<?xml version="1.0" encoding="utf-8"?> +<Solution Version="1"> <Project Path="src/support/Selenium.WebDriver.Support.csproj" /> <Project Path="src/webdriver/Selenium.WebDriver.csproj" /> <Project Path="test/chrome/Selenium.WebDriver.Chrome.Tests.csproj" /> <Project Path="test/common/Selenium.WebDriver.Common.Tests.csproj" /> <Project Path="test/edge/Selenium.WebDriver.Edge.Tests.csproj" /> <Project Path="test/firefox/Selenium.WebDriver.Firefox.Tests.csproj" /> <Project Path="test/ie/Selenium.WebDriver.IE.Tests.csproj" /> <Project Path="test/remote/Selenium.WebDriver.Remote.Tests.csproj" /> <Project Path="test/safari/Selenium.WebDriver.Safari.Tests.csproj" /> <Project Path="test/support/Selenium.WebDriver.Support.Tests.csproj" /> </Solution> Apply / Chat Suggestion importance[1-10]: 6 __ Why: Relevant best practice - Include a header and schema/version metadata in XML config files to document format and improve tool compatibility.	Low
Update

[RenderMichael]

The way I have it here will replicate the "flat" solution approach, with all the projects one after the other.

We can also follow the folder structure, which I think is nice:

@nvborisenko What do you think, would you be comfortable working with this solution structure?

[nvborisenko]

I prefer Selenium.csproj and Seleenium.Support.csproj in the root of sln. Tests in folder.

[nvborisenko]

@YevgeniyShunevych your opinion?

[YevgeniyShunevych]

I support the structure of the latest message. Looks better. No need in those many folders.

[nvborisenko]

In any case core projects in the root, tests projects somewhere hidden. BTW related to #15536.

[RenderMichael]

Implemented folder structure for tests (Visual Studio seems to put the tests folder at the top for me, for some reason).