setup-dotnet/.github/dotnet-format.json

{
    "problemMatcher": [
        {
            "owner": "dotnet-format",
            "pattern": [
                {
                    "regexp": "^\\s*(.*)\\((\\d+),(\\d+)\\):\\s+(error|warning|info)\\s+:\\s+(.*)\\s+\\[(.+)\\]$",
                    "file": 1,
                    "line": 2,
                    "column": 3,
                    "severity": 4,
                    "code": 5,
                    "message": 6,
                    "fromPath": 7
                }
            ]
        }
    ]
}