3F/DllExport

Health v2 · maintenance only

Adoption not part of the score

1097 stars · 143 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A .NET library and MSBuild tooling that lets C#/.NET assemblies export functions as unmanaged native exports (DllExport attribute), including .NET Core support. It works by post-build IL rewriting (ildasm/ilasm) so native hosts like C++, Java, Rust, or Python can call managed code via P/Invoke-style exports.

Use cases

• export C# functions as native DLL exports for C++ callers
• call managed .NET code from Java, Rust, or Python via a DLL
• create unmanaged exports from .NET Core assemblies
• replace Robert Giesecke's UnmanagedExports with a maintained tool
• build mixed native/managed plugin DLLs

When to choose

• you need .NET code exposed as native exported functions in a DLL
• you want .NET Core/CLR support for DLL exports
• you need a maintained alternative to UnmanagedExports

When to avoid

• you only need to call native DLLs from .NET (plain P/Invoke suffices)
• you target non-Windows native hosting without IL-rewriting support
• you want a fully managed hosting API like DNNE or hostfxr instead of IL post-processing

Facets

library · maturity active

compiler build-tool developer-tools developer-tools cross-platform programming-languages windows dotnet cpp dllexport pinvoke ilasm ildasm native-interop unmanaged-exports msbuild net-core

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