Native C# API
A first-class .NET library — load a .udf, query it, and work with results using idiomatic C#.
Live
DocNest .NET
The engine, for C#.
The DOCNEST engine, ported to the .NET ecosystem. Read and query the same
.udf knowledge files from C# — byte-compatible with DOCNEST,
local-first, and ready to drop into your apps.
.udf files are byte-compatible with DOCNEST —
index in Python, read in C#, or the reverse. Same files, both engines,
no conversion step.
What you get
Local-first knowledge, natively in .NET
The same structure-first model your Python tools use — available where your C# apps live.
Byte-compatible .udf
Reads the exact files DOCNEST writes — no re-indexing, no format drift between your Python and C# tools.
NuGet install
Add it from NuGet and reference it like any package — into a console app, service, or desktop app.
Local-first
Runs in-process on your machine. Your documents stay where your application runs.
Same model, structure-first
The DOCNEST approach — answer from structure where possible — carried over to .NET.
Open & MIT-licensed
Free to use in commercial and personal projects, built in the open alongside the rest of the platform.
In the platform
DocNest .NET pairs with
Bring it into your .NET app
Open source and MIT-licensed. Pull the package and read your first .udf in minutes.