There's something called CSharp in GDAL sources. I've no idea what it is. Bye bye ! https://github.com/OSGeo/gdal/pull/11746
Remove CSharp bindings by rouault · Pull Request #11746 · OSGeo/gdal

Nobody has stepped up despite call for action in https://lists.osgeo.org/pipermail/gdal-dev/2024-September/059550.html, drawing conclusions... More cleanup would be needed. Will do if we go that road

GitHub
@EvenRouault I wonder if Esri used the C# bindings for its software as ArcMap and ArcPro are .NET applications in C#.
@techdude If so, they're welcome to volunteer helping maintain them. The pull request isn't yet merged...