Hi Alexander,
I moved to new version 26.5 and here my results:
Please see:
Comparison(csv-left, right Gdb) through GeoJson
image.png (198.5 KB)
Test data(input/output/QGIS)
5333-Csv-Gdb.zip (61.4 KB)
Thanks,...Define CSV reader options var csvOptions = new CsvReaderOptions {...Open("5333-Csv-Gdb/input.csv", Drivers.Csv, csvOptions); // 3. Create a File Geodatabase...