Add *.slnx to UnrealEngine.gitignore - #4907
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UnrealBuildTool (UBT) auto-generates .slnx solution files the same way it generates .sln/.vcxproj, based on the project's .uproject and .Build.cs configuration. These generated files may contain locally-mounted paths or personal dev environment settings, which can cause conflicts when shared between team members. As with other generated project files, they can be regenerated anytime via 'Generate Visual Studio project files' as long as the Source folder, Content folder, and .uproject file are present. Docs: - https://dev.epicgames.com/documentation/en-us/unreal-engine/project-files-for-ides-in-unreal-engine - https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-build-tool-in-unreal-engine
ArshVermaGit
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Sep 9, 2026
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Looks correct. The *.slnx exclusion is appropriate and the change is clean.
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Unreal Engine
Reasons for making this change
Visual Studio 2022 (v17.10+) introduced a new solution file format, .slnx, which serves the exact same role as the .sln file this template already ignores. Unreal Engine's UnrealBuildTool (UBT) generates IDE project files (.sln/.slnx, .vcxproj, etc.) from the project's .uproject and *.Build.cs files, and they can be regenerated at any time via "Generate Visual Studio project files" as long as the Source folder, Content folder, and .uproject file are present. These generated files are treated as intermediate build artifacts and may embed locally-mounted paths or personal environment settings, so — like .sln — they should not be shared between team members. This applies to every Unreal Engine developer using Visual Studio 2022 or later, not just a specific setup.
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