It's possible to use ParquetSharp from PowerShell.
You can install ParquetSharp with the NuGet command line interface,
then use Add-Type to load ParquetSharp.dll.
However, you must ensure that the appropriate ParquetSharpNative.dll for your architecture and OS can be loaded as required,
either by putting it somewhere in your PATH or in the same directory as ParquetSharp.dll.
For examples of how to use ParquetSharp from PowerShell,
see these scripts from Apteco.