If you've ever wanted to read [and subsequently edit] the output of a C# .NET BinaryFormatter.Serialize() file, this quickly-made Node.JS script works for me.

Sample data is provided in input/ and output/ directory for comparison.
(ie. the save game file from a popular indie Unity game: Bendy and the Ink Machine)

NOTICE: The file format specification is documented here:

• [MS-NRBF]: .NET Remoting: Binary Format Data Structure

WARNING: About 75% of the spec is implemented by this script. If it doesn't work for you, chances are there is work remaining to be completed on this code, but it should be minimal, and if you were considering writing your own code from scratch, then this may still be a useful example for you to copy, or complete. PRs welcome!

node csharp-assembly-dump.js input/batim.game > output/out.log