The HybridMemoryStream created in the Transposer

is closed, but never disposed. This is because the Dispose implementation of the BinaryLoader here

only calls Dispose on the System.IO.BinaryReader it contains, which in turn only calls Close on HybridMemoryStream, but not Dispose (see https://referencesource.microsoft.com/#mscorlib/system/io/binaryreader.cs,91). Therefore, the deletion of the temporary file here

is never reached.

This is causing the temporary directory on my PC to fill up all the available space on the disk.